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With a short interval eruption in the middle of the night, didn't need to go back to Grand until mid-morning. Only waited about an hour before West Triplet started. That was quickly followed by the One Burst Eruption. The one notable thing about the eruption was that it took Vent over four minutes to get started.

2026-Jun-04 : 10:29:48 G1Q

 10:29:47	Boop	-0m01s
 10:29:48	B1	--- d=11m02s
 10:30:43	Turban	0m55s
 10:32:22	Vent Ovfl	2m34s
 10:33:56	Vent	4m08s
 10:40:50	P1	11m02s
 10:41:41	V&T Quit	11m53s
 11:01:45	V&T Restart	31m57s

				     	ΣD=11m02s
	* * * * *
 09:25:25			d=04m34s 	
 09:45:42	Int: 20m17s	d=04m17s 	
 10:06:22	Int: 20m40s	d=04m20s 	
 10:24:36	West Triplet
 11:07:31	Rift
		      Grand: 23m26s

After the eruption ended, I stuck around to see either West Triplet end, or Rift start. It was the latter, which started shortly before Beehive erupted. I caught that eruption from over by Castle.

Spent a couple of hours in the Bijou Cage. Bijou was pausing for about 75 seconds every 22 or so minutes, except at one point there was a 13 minute interval with a corresponding shorter pause. Then a 22 minute interval with a 2-1/2 minute pause. I didn't see anything from Mastiff during that time.

Emerald was rising and falling regularly, about ten minutes at the rim, bubbling slightly, then ten minutes out of sight. Giant had some nice cone filling vertical surges that got up as high as the top of the bite on the right side.

Late afternoon was partly cloudy and breezy at times. Without the sun out the wind made it almost uncomfortable, and the changes meant it went from underdressed to overdressed. Fortunately there was no rain and the wait was short.

I did see one complete Turban eruption interval before Grand filled nicely around 17 minutes, started having waves that built in intensity, then erupting at around the twenty minute mark. Once again, it took Vent nearly four minutes to start, which is much longer than I am used to seeing.

West Triplet started a few seconds before the first burst ended, then we a nice second burst that lasted over a minute. The West Triplet eruption was not followed by Rift, but Sput C1 was again active. At this point I think the sput will be a regular feature of those eruptions.

2026-Jun-04 : 17:03:15 G2Q

 17:03:15	B1	--- d=08m56s
 17:03:40	Vent Ovfl	0m25s
 17:04:01	Turban	0m46s
 17:07:13	Vent	3m58s
 17:12:11	P1	8m56s d=43s
 17:12:54	B2	9m39s d=01m02s
 17:13:56	P2	10m41s
 17:14:37	V&T Quit	11m22s
 17:36:39	V&T Restart	33m24s

				     ΣB=09m58s	ΣD=10m41s
	* * * * *
 16:24:46ns			
 16:42:55	Int: 18m09s	d=03m44s 	
 17:12:02	West Triplet d=34m20s 
		      Grand: 20m20s

Got back out to Grand about an hour before midnight. Within that hour we got a West Triplet eruption and a Turban Delay Interval. Most likely it would be several hours before Grand would finally erupt, so we headed back in just after midnight.

2026-Jun-04 : 23:02:14

 23:02:17			d=02m15s 	
 23:19:40	Int: 17m23s	d=04m32s 	
 23:28:32	West Triplet
 23:53:07	Int: 33m27s	d=04m36s  D0	

The day started with a radio call for Beehive's Indicator. Unlike yesterday, this was at the start, not when it had been erupting for ten minutes.

The sun was coming over the ridge, so the top of Beehive's water column was in the sun, while the bottom quarter was still in the shadow. This mean we got a strong double rainbow at the top of the water column, and the shadow of the water column being projected over the meadow across the river.

Overnight, Grand had a long interval, so there was plenty of time before heading out. This was a clear but windy day. About an hour after I got out there, Turban had its Delay Interval eruption. That was followed by seven more Turban intervals before we got what looked like it would be another Delay. Instead of sitting full for ten minutes, the waves on Grand built up and we got a long One Burst Eruption. At the end, despite the length, there was water sloshing about in Grand's vent for over a minute. then we finally got our West Triplet eruption.

2026-Jun-03 : 13:19:31 D7/G1Q

 13:19:28	Boop	-0m03s
 13:19:31	B1	--- d=10m30s
 13:19:34	Vent Ovfl	0m03s
 13:19:56	Turban	0m25s
 13:22:11	Vent	2m40s
 13:30:01	P1	10m30s
 13:31:11	Drain	11m40s
 13:31:26	V&T Quit	11m55s

				     	ΣD=10m30s
	* * * * *
 10:10:49			d=04m54s 	
 10:28:32	Int: 17m43s	d=03m45s 	
 11:03:46	Int: 35m14s	d=05m08s  D0	
 11:21:26	Int: 17m40s	d=03m43s  D1	
 11:40:55	Int: 19m29s	d=03m56s  D2	
 11:59:32	Int: 18m37s	d=03m29s  D3	
 12:19:17	Int: 19m45s	d=03m54s  D4	
 12:38:32	Int: 19m15s	d=03m05s  D5	
 12:56:26	Int: 17m54s	d=03m31s  D6	
 13:38:18	West Triplet
		      Grand: 23m05s

Spent the afternoon bug fixing my GeyserLog app, and was surprised to see that I'd lost track of the time and it was already 5-1/2 hours since that Grand eruption. Expected that the eruption would be well after sunset, so dressed appropriately.

Got out in time to see the start of West Triplet. When Grand didn't follow up with an eruption on the next couple of Turban eruption opportunities, that insured a post-sunset eruption. Fortunately, Rift stayed quiet when West Triplet finally ended. It was such a nice night that I had to apply bug repellent as the mosquitoes were active.

While West Triplet was erupting, Sput C-1 was also active. It could be easily heard from the boardwalk as it splashed and pushed out a steady stream of water.

It was still light enough to see Grand's pool having a late fill, and to see the start of another One Burst Eruption. There wasn't any wind, so there was also a nice base surge rolling across the formations and putting up a wall of obscuring steam.

2026-Jun-03 : 21:24:04 T1Q

 21:23:59	Vent Ovfl	-0m05s
 21:24:00	Boop	-0m04s
 21:24:02	Turban	-0m02s
 21:24:04	B1	--- d=10m03s
 21:27:07	Vent	3m03s
 21:34:07	P1	10m03s
 21:36:10	V&T Quit	12m06s

				     	ΣD=10m03s
	* * * * *
 19:25:06	West Triplet d=41m28s 
 19:31:47			d=05m41s 	
 19:49:52	Int: 18m05s	d=04m08s 	
 20:08:25	Int: 18m33s	d=03m17s 	
 20:29:17	Int: 20m52s	d=04m05s 	
 20:48:45	Int: 19m28s	d=03m46s 	
 21:05:54	Int: 17m09s	d=03m32s 	
		     Turban: 18m08s

After not going out to last night's One Burst Grand Eruption, left at dawn for the next Grand opportunity. After a West Triplet eruption started, we got a Turban Delay Interval. That led to a short Turban eruption interval under 17 minutes, and then a Rift eruption that lasted about 13 minutes.

Grand tried again to have another Turban Delay Interval after four Turban eruption intervals, but that interval came up about a minute short. Then there was a short, almost 16 minute Turban interval, which finally led to the morning's One Burst Grand eruption.

2026-Jun-02 : 08:10:08 D6/G1Q

 08:09:57	Vent Ovfl	-0m11s
 08:10:06	Boop	-0m02s
 08:10:08	B1	--- d=11m48s
 08:10:15	Turban	0m07s
 08:13:04	Vent	2m56s
 08:21:56	P1	11m48s
 08:22:34	V&T Quit	12m26s

				     	ΣD=11m48s
	* * * * *
 05:45:15			d=03m18s 	
 05:59:44	West Triplet d=51m17s 
 06:10:52	Int: 25m37s	d=04m12s  D0	
 06:27:46	Int: 16m54s	d=03m42s  D1	
 06:47:38	Int: 19m52s	d=03m29s  D2	
 06:48:22	Rift
 07:08:39	Int: 21m01s	d=03m54s  D3	
 07:32:47	Int: 24m08s	d=03m21s  D4	
 07:48:46	Int: 15m59s	d=03m19s  D5	
		      Grand: 21m22s

Later went to Fan & Mortar and spent over two hours watching nothing happen. For the first hour or so, there was a series of Fan vents splashing, sometimes fairly strong, alternating with nothing happening. Then Upper Mortar rumbled a couple of times, That's when Bottom Vent started to splash, and High and Gold became strong, tall and non-stop. When Fan's vents finally quit, that's when Main Vent started splashing. Most of the splashes were the small, just visible variety, but there were a few strong, noisy bursts that filled the crater. That activity lasted for well over an hour, and continued up to the time I left.

For the afternoon Grand, the wait was until West Triplet was ready. For almost the first two hours, nothing the Turban eruption intervals were a bit long, but otherwise uninteresting. Then there was a Delay Turban Interval lasting well over 30 minutes. Three Turban eruption intervals later, we got a second, even longer Turban interval that also ended in a Turban Delay interval.

Finally West Triplet started to erupt, and twenty minutes later Grand filled nicely and we got a long One Burst Eruption where Grand actually started on the early side of the Turban eruption interval.

2026-Jun-02 : 17:50:33 D3/D3/T1Q

 17:50:00	Vent Ovfl	-0m33s
 17:50:09	Turban	-0m24s
 17:50:28	Boop	-0m05s
 17:50:33	B1	--- d=11m10s
 17:53:03	Vent	2m30s
 18:01:43	P1	11m10s
 18:01:57	V&T Quit	11m24s

				     	ΣD=11m10s
	* * * * *
 13:59:52			
 14:17:42	Int: 17m50s	d=03m39s 	
 14:38:39	Int: 20m57s	d=03m53s 	
 14:59:35	Int: 20m56s	d=03m18s 	
 15:20:10	Int: 20m35s	d=03m38s 	
 15:50:53	Int: 30m43s	d=04m11s  D0	
 16:07:42	Int: 16m49s	d=02m32s  D1	
 16:24:17	Int: 16m35s	d=02m46s  D2	
 16:58:30	Int: 34m13s	d=04m11s  D3/D0	
 17:15:06	Int: 16m36s	d=03m18s  D3/D1	
 17:30:51	West Triplet
 17:32:32	Int: 17m26s	d=03m19s  D3/D2	
		     Turban: 17m37s

While waiting, a black bear appeared out on the flat below the Rift runoff channel. It must have gone through the Sawmill Group or followed the river past Liberty Pool to get there. It continued onwards, crossing the river and was last seen headed for the bike trail.

Afterwards, based on a sunset eruption prediction for Great Fountain. Unfortunately, the sun disappeared behind a cloud bank even though it had about 15 minutes remaining before dropping below the horizon. But the Great Fountain eruption was strong, with a number of noisy, fairly tall looking jets. The first burst ended and we left before it got too dark.

The boardwalks were especially slick in the morning, the whole way from Castle to Grand. Arrived at the end of a Turban eruption, and before the next one West Triplet began erupting. Forty-five minutes later, after about fifteen minute of heavy steaming, Rift too began erupting. The Rift eruption was short and the West Triplet was long, such that Rift ended only fifteen minutes after West Triplet ended.

The One Burst Grand eruption came on the next Turban start, which was also a Delay interval. It was backlit, but the wind was such that not much could be seen, other than it seemed tall.

2026-Jun-01 : 08:19:52 D0/T1C

 08:19:33	Turban	-0m19s
 08:19:52	B1	--- d=10m24s
 08:22:42	Vent	2m50s
 08:30:16	P1	10m24s
Vent & Turban continue

				     	ΣD=10m24s
	* * * * *
 06:35:55			d=28s 	
 06:46:59	West Triplet d=01h04m 
 06:52:11	Int: 16m16s	d=04m18s 	
 07:12:24	Int: 20m13s	d=03m46s 	
 07:30:27	Rift d=35m07s 
 07:32:01	Int: 19m37s	d=03m38s 	
 07:52:36	Int: 20m35s	d=03m27s 	
		     Turban: 26m57s

The other night, over in the Grand runoff channel between West Triplet and Rift, we heard some gurgling, and it looked like a small vent was active. This morning, before Rift began, I was able to confirm and photograph this feature. It appears to be what I called "Sput C-1" back in the early 1980s. To the left, the sput called "C-2" was also steaming heavily. I recall these only being active briefly, and I don't remember seeing them since the mid-1980s.

After than, it was a mostly sunny but cold, windy wait on Geyser Hill. It had been 26 hours since the previous eruption of Beehive, so it seemed likely to erupt soon. After about an hour, with little indication of an eminent eruption, Beehive suddenly had a large surge as if starting to erupt. That didn't happen, but after a pause of about five seconds, a second surge initiated an eruption. It was nice a tall despite the wind, and lasted almost 5-3/4 minutes.

In the afternoon it was sunny, but still windy and a bit cool. West Triplet erupted about an hour after arrival, and the duration was less than a half hour, so no Rift eruption. But that meant we would probably get to wait a couple of hours before Grand would attempt to erupt. And it did.

During that time there was also a short Castle minor eruption, and a Bulger major eruption with not even steam from Bulger's Hole.

The One Burst Grand Eruption came on a Turban eruption interval which was six seconds short of being a Delay Interval. Despite the wind, the eruption was nice and tall at first, but turned into Big Sawmill for the last few minutes. West Triplet never erupted, but did rise up in the vent to only drop below visibility, all within about a minute.

2026-Jun-01 : 16:22:43 G1Q

 16:22:43	B1	--- d=11m21s
 16:23:04	Vent Ovfl	0m21s
 16:23:34	Turban	0m51s
 16:25:34	Vent	2m51s
 16:34:04	P1	11m21s
 16:35:28	V&T Quit	12m45s

				     	ΣD=11m21s
	* * * * *
 14:00:59			
 14:19:30	Int: 18m31s	d=03m51s 	
 14:27:53	West Triplet d=28m56s 
 14:41:02	Int: 21m32s	d=04m23s 	
 15:00:26	Int: 19m24s	d=03m15s 	
 15:20:17	Int: 19m51s	d=03m47s 	
 15:39:18	Int: 19m01s	d=03m05s 	
 15:57:49	Int: 18m31s	d=03m35s 	
		      Grand: 24m54s

Another cool and damp morning, but no wind. Got out to Grand in time to catch the Turban eruption prior to the Turban Delay Interval. Percolator was quiet, and I heard gurgling at depth in West Triplet, so I assumed that we were going to have to wait for West Triplet to recover from Rift erupting a few hours earlier. There was some rain, but nothing like yesterday.

That was the case, as it took Grand eight Turban intervals before I showed any inclination toward erupting. Percolator had been quiet for nearly three hours, but was active again just before the One Burst Grand eruption. West Triplet rose up and began to erupt shortly after Vent started. This eruption was short, at around 9-1/2 minutes, but too long for a second burst. There was some sloshing visible for about ten seconds, then a drained vent.

2026-May-31 : 09:16:24 D8/G1C

 09:16:19	Boop	-0m05s
 09:16:24	B1	--- d=09m33s
 09:17:00	Vent Ovfl	0m36s
 09:17:15	Turban	0m51s
 09:19:57	Vent	3m33s
 09:25:57	P1	9m33s
Vent & Turban continue

				     	ΣD=09m33s
	* * * * *
 06:18:36			d=04m09s 	
 06:50:02	Int: 31m26s	d=04m32s  D0	
 07:06:53	Int: 16m51s	d=04m05s  D1	
 07:26:27	Int: 19m34s	d=03m22s  D2	
 07:46:42	Int: 20m15s	d=03m44s  D3	
 08:06:07	Int: 19m25s	d=03m53s  D4	
 08:22:43	Int: 16m36s	d=03m36s  D5	
 08:41:33	Int: 18m50s	d=03m37s  D6	
 08:58:38	Int: 17m05s	d=03m40s  D7	
 09:21:46	West Triplet
		      Grand: 17m46s

Over the last few days, with all the rains, I've noticed that the Firehole River has finally covered the Sawmill runoff channel shelf below the bridge.

Leaving the cabin, I was wondering if I was overdressed. By the time I got to Sawmill Group, I was wondering if I should've added another layer in the pack, just in case.

As it turned out, it didn't really matter. I saw Turban in eruption from the Castle bike rack, so spent a little time by Uncertain watching it not do much. I arrived at Grand just in time to see West Triplet start. The next Turban eruption was short, and the pool seemed especially low afterwards, making me think I might have see a Turban Delay Interval eruption from the bike rack.

Instead there was a steady fill in Grand's pool, and even though it seemed like we were about to get a definite Turban Delay Interval, Grand boiled up well before the deadline.

The burst wasn't very big, but there was enough wind to push the wind and steam away. With the duration under nine minutes, it wasn't certain there would be a second burst, but it was quite likely.

The pause was one of the shorter one, only 20 seconds. The burst was short. I jokingly said it was 105 feet, while Ben Vander Lay measured it at 103 feet. With the long second burst, it's almost like the pause was an extended version of the false pauses we see so often.

2026-May-31 : 15:40:59 T2*Q

 15:40:36	Turban	-0m23s
 15:40:59	B1	--- d=08m29s
 15:44:21	Vent	3m22s
 15:49:28	P1	8m29s d=20s
 15:49:48	B2	8m49s d=01m42s
 15:51:30	P2	10m31s
 15:52:14	V&T Quit	11m15s

				     ΣB=10m11s	ΣD=10m31s
	* * * * *
 14:58:31			
 15:16:43	West Triplet
 15:17:48	Int: 19m17s	d=02m58s 	
		     Turban: 22m48s

I waited around afterwards for the end of West Triplet, and a possible start of Rift. With the weather coming in, I left as soon as the first ended, and in because apparent that the steam wasn't getting stronger in the latter.

It really does seem that too often I am fine when Grand ends, and end up in the cabin drenched from the walk and bike ride back.

With the end of the rains, clearing skies and a full moon, had to at least try and see the next Grand eruption. West Triplet was in eruption when I arrived, and it seemed like Grand was pouring off a lot of water. Based on the Turban eruption duration and the next Turban interval, I would assume there was a Turban Delay interval.

Rift started shortly after, but it only erupted for about 45 minutes. Despite that, it took Grand three hours to finally have the One Burst Eruption. The start was nice and tall, and the eruption was well lit by the moon.

2026-Jun-01 : 00:42:45 T1C

 00:42:00	Turban	-0m45s
 00:42:45	B1	--- d=09m21s
 00:52:06	P1	9m21s
Vent & Turban continue

				     	ΣD=09m21s
	* * * * *
 21:40:23ie	West Triplet d=42m05s 
 21:52:14			d=04m55s 	
 22:10:07	Int: 17m53s	d=04m08s 	
 22:21:47	Rift
 22:28:52	Int: 18m45s	d=03m57s 	
 22:49:01	Int: 20m09s	d=03m27s 	
 23:08:33	Int: 19m32s	d=03m31s 	
 23:29:23	Int: 20m50s	d=03m38s 	
 23:46:41	Int: 17m18s	d=03m47s 	
 00:05:56	Int: 19m15s	d=03m17s 	
 00:24:18	Int: 18m22s	d=03m29s 	
		     Turban: 17m42s

I considered going for a moonlight Grand eruption, but at around midnight the moon was behind a cloudbank, and the weather radar map showed incoming showers in an hour or two, so I decided to stay indoors.

In the morning the rains had let up by the time to head out for the next Grand eruption, and again the radar map showed incoming showers. A steady rain started as I arrived. Fortunately I was able to set myself up and stayed dry the whole time.

West Triplet was also in eruption as I arrived, and the One Burst Grand Eruption started on the Turban eruption after the end of West Triplet. The eruption was just long enough to preclude a second burst.

2026-May-30 : 09:37:23 T1C

 09:37:10	Turban	-0m12s
 09:37:23	B1	--- d=09m40s
 09:47:03	P1	9m40s
Vent & Turban continue

				     	ΣD=09m40s
	* * * * *
 08:49:56ie	West Triplet d=31m27s 
 08:56:11			d=05m11s 	
 09:15:09	Int: 18m58s	d=02m31s 
		     Turban: 22m01s

The rains had stopped by the afternoon, but it was still cold, damp, and windy. Turban was in eruption as I arrived, and it didn't erupt again until over half an hour later. Fortunately, the wait was a reasonable four Turban eruption intervals. Grand even managed to start well before that interval would have become a Delay Interval. The pool was high with nice waves when everything happened in a matter of seconds. The duration of the burst was well over nine minutes, which is that intermediate range where the eruption could easily be one or two bursts. Fortunately, as the pause approached a minute, water could be seen through all the steam doming over the vent. Once again, it seemed like Turban quit at the same time as Grand. Also, West Triplet started near the end of the first burst.

2026-May-30 : 17:23:10 D4/T2Q

 17:23:03	Turban	-0m07s
 17:23:04	Boop	-0m06s
 17:23:07	Vent Ovfl	-0m03s
 17:23:10	B1	--- d=09m12s
 17:25:52	Vent	2m42s
 17:32:22	P1	9m12s d=01m00s
 17:33:22	B2	10m12s d=46s
 17:34:08	P2	10m58s
 17:34:47	V&T Quit	11m37s

				     ΣB=09m58s	ΣD=10m58s
	* * * * *
 15:32:34			d=01m36s 	
 16:04:09	Int: 31m35s	d=04m57s  D0	
 16:21:39	Int: 17m30s	d=03m30s  D1	
 16:40:54	Int: 19m15s	d=03m55s  D2	
 16:58:50	Int: 17m56s	d=03m36s  D3	
 17:29:17	West Triplet
		     Turban: 24m13s

The first Turban eruption after I arrive at Grand in the morning is a Delay interval. Three eruptions later we get a second Delay Interval. It takes five more Turban intervals before West Triplet starts to erupt. Grand finally has the One Burst Eruption another Turban eruption interval later. Instead of triggering Rift, West Triplet ends early in Grand's eruption.

2026-May-29 : 10:06:39 D3/D6/T1C

 10:06:22	Vent Ovfl	-0m17s
 10:06:23	Turban	-0m16s
 10:06:33	Boop	-0m06s
 10:06:39	B1	--- d=09m44s
 10:09:09	Vent	2m30s
 10:16:23	P1	9m44s
Vent & Turban continue

				     	ΣD=09m44s
	* * * * *
 07:12:04			d=05m13s  D0	
 07:30:14	Int: 18m10s	d=04m11s  D1	
 07:49:44	Int: 19m30s	d=04m22s  D2	
 08:22:03	Int: 32m19s	d=03m55s  D3/D0	
 08:38:18	Int: 16m15s	d=04m12s  D3/D1	
 08:55:59	Int: 17m41s	d=03m57s  D3/D2	
 09:15:08	Int: 19m09s	d=03m39s  D3/D3	
 09:32:53	Int: 17m45s	d=03m42s  D3/D4	
 09:33:59	West Triplet
 09:50:14	Int: 17m21s	d=03m21s  D3/D5	
		     Turban: 16m09s

After a period of housekeeping chores, I thought I might go down to the Bijou Monkey Cage and check out what's happening at Giant. Didn't spend much time there, as it looked like a rain-shower was coming in. I did see overflow from Emerald and a 1m46s Bijou pause. (The rain never materialized.)

It seems like Grand's series of short six to seven hour intervals has come to a close, but I still went out a bit early to make up for my coming in early. Got out in time to probably see the end of another Turban Delay interval. An hour later West Triplet began to erupt.

On the fourth Turban eruption after the Delay, there was a definite Turban Delay Interval. The interval looked normal, but Grand didn't start dropping around the time the Turban eruption would have been expected. Instead, the pool level continued to rise, with small ripples. Unlike so many recent Delay intervals, this one could be considered short at 26-1/2 minutes.

There was a dark cloud as a backdrop for the eruption, but the sun was out and a rainbow could be seen.

The burst looked like it tried to quit around the eight minute mark, then picked back up. Then 30 seconds later a second slowdown, this time resulting in a pause. That pause lasted almost a minute, and it wasn't until near the end that water could be sloshing in Grand's vent. Once again, it seemed like Turban had quit before Grand, but then the sloshing picked up again before it finally quit for real.

2026-May-29 : 17:46:11 D0/G2Q

 17:46:09	Boop	-0m02s
 17:46:11	B1	--- d=08m25s
 17:46:14	Turban	0m03s
 17:46:16	Vent Ovfl	0m05s
 17:49:24	Vent	3m13s
 17:54:36	P1	8m25s d=57s
 17:55:33	B2	9m22s d=01m00s
 17:56:33	P2	10m22s
 17:57:16	V&T Quit	11m05s

				     ΣB=09m25s	ΣD=10m22s
	* * * * *
 16:21:54			d=05m48s 	
 16:40:46	Int: 18m52s	d=04m18s 	
 17:00:13	Int: 19m27s	d=04m36s 	
 17:15:56	West Triplet
 17:19:32	Int: 19m19s	d=03m48s
 17:57:10       Rift	
		      Grand: 26m39s

Rift started to erupt as Vent & Turban quit. West Triplet was still in eruption as we left. As so often happens it seems, the rain-showers started for real at that point, making for a wet exit from the basin.

---

When I head down to Fan & Mortar for the first time in a season, I go with the expectation of getting to see what is the current normal, typical activity. I expect that activity to be different from what I saw last year, or the year before. That feature changes every year. I'm not going to be The One who gets to see it come out of a dormancy, or do something unusual that no one else has seen. I figure others have probably seen before the activity that I see. What seems to be the current normal Fan & Mortar activity is different from previous years, and in previous years would have been considered noteworthy and signs of an imminent eruption.

It seems like every day this week a new gazer shows up and heads down to Fan & Mortar to take a look. They start posting and announcing over the radio a detailed play-by-play of events that have been repeatedly shown to be irrelevant a lead in to an eruption.

This year, it seems we need to get used to seeing Main Vent having periods of huge splashes that last a half-hour or more. These splashes can be as wide as the vent, and reach a height of two meters. We need to get used to the minor Fan vents going into the so-called "lock" state, where for five to ten minutes, they are flooding out water, erupting continuously, and High reaching a height of three to four meters. Angle may or may not join in with High and Gold during these times. We need to get used to Bottom Vent erupting without putting out enough water for the runoff to reach the river.

When I awoke at 05:00 surprised to see an entry for Turban around 04:30. That meant that Grand probably hadn't erupted, and worth going out. It was just getting light and a bit foggy, but I arrived to find Grand still full at 9-1/2 hours. There didn't seem to be any indication of a recent Rift eruption.

I then got to wait through an hour's worth of short Turban intervals and durations before West Triplet started to erupt. A half hour later Grand finally got around to erupting, nearly an eleven hour interval. This time the Turban to Grand interval was more normal, and I was even able to see Vent overflow beforehand.

Rift started erupting during the first burst. The Grand burst ended abruptly with a short duration well under eight minutes, but the second burst lasted over 2-1/2 minutes. West Triplet was still in eruption as I left.

2026-May-28 : 06:49:50 T2*Q

 06:49:16	Turban	-0m34s
 06:49:32	Vent Ovfl	-0m18s
 06:49:50	B1	--- d=07m39s
 06:52:01	Vent	2m11s
 06:57:29	P1	7m39s d=41s
 06:58:10	B2	8m20s d=02m34s
 07:00:44	P2	10m54s
 07:01:32	V&T Quit	11m42s

				     ΣB=10m13s	ΣD=10m54s
	* * * * *
 05:23:56			d=03m18s 	
 05:39:55	Int: 15m59s	d=02m45s 	
 05:56:22	Int: 16m27s	d=03m30s 	
 06:14:27	Int: 18m05s	d=03m13s 	
 06:20:39	West Triplet
 06:33:21	Int: 18m54s	d=03m17s 	
 06:56:00	Rift
		     Turban: 15m55s

After breakfast went over to Daisy. The wind was uncooperative, and the duration of the eruption was only 3-1/2 minutes.

Then it was down to Fan & Mortar, where there was more activity that can look really good, until you realize that it does it alot. In this case, after being mostly quiet with just Angle erupting for about 40 minutes, High and Gold started. They quickly increased in height until High was going about 3-4 meters. This lasted about ten minutes, then quickly died down. After another ten minutes of just Angle splashing, I left the area.

Got out to Grand at the six hour mark. Got to see a normal Turban eruptions and then a Delay Interval eruption. When I went out, I was hoping Grand would hold off a bit, having an eruptions between 14:00 and 15:00. That would set the next eruption up to be just after dark by a nearly full moon. As it turned out, the delay lasted for eight Turban eruption intervals, and it was nearly 16:00 before we got the One Burst Grand eruption. Once again, there were a couple of periods during the eruption where the jetting quieted down, and in decades past that would have resulted in the end of the burst. This time it seemed that Turban quit as Grand quit.

2026-May-28 : 15:46:45 D8/T1Q

 15:46:05	Turban	-0m40s
 15:46:08	Vent Ovfl	-0m37s
 15:46:35	Boop	-0m10s
 15:46:45	B1	--- d=11m30s
 15:49:23	Vent	2m38s
 15:58:15	P1	11m30s
 15:58:21	V&T Quit	11m36s

				     	ΣD=11m30s
	* * * * *
 12:40:40			d=03m40s 	
 13:14:41	Int: 34m01s	d=05m11s  D0	
 13:34:17	Int: 19m36s	d=04m03s  D1	
 13:53:59	Int: 19m42s	d=03m28s  D2	
 14:15:06	Int: 21m07s	d=03m59s  D3	
 14:34:43	Int: 19m37s	d=03m57s  D4	
 14:52:08	Int: 17m25s	d=02m55s  D5	
 15:10:18	Int: 18m10s	d=03m41s  D6	
 15:28:35	Int: 18m17s	d=03m33s  D7	
		     Turban: 17m30s

West Triplet started to erupt just after Grand.

Afterwards, went back to Fan & Mortar where there was another series of tall activity from the Fan vents. The first time it was just High and Gold, the second time Angle joined in, and they activity wasn't quite as high.

Beehive's Indicator got called just before sunset, and the sun sat during the Beehive eruption. Unfortunately, the wind was in the wrong direction for rainbows. Instead the view was into the sun, but it was still interesting lighting.

It was still a bit light when it was time to head out for Grand again, and wait for a moonlight eruption. On the way out had to dodge a bison near cabin 200 and a second one below the lift station. Arrived in time to catch the start of a West Triplet eruption.

Unfortunately, that meant we got to wait for the next West Triplet eruption opportunity. Three hours later, after midnight, Grand finally did erupt, with West Triplet following within a few minutes. The first burst seemed too short for it to be the only one, and after a relatively short pause, we got another burst. About 30 seconds in, it seemed like the burst was stopping, but then it continued on for a total of nearly a minute.

2026-May-29 : 00:36:15 T2C

 00:35:31	Turban	-0m44s
 00:36:15	B1	--- d=08m17s
 00:44:32	P1	8m17s d=35s
 00:45:07	B2	8m52s d=57s
 00:46:04	P2	9m49s
Vent & Turban continue

				     ΣB=09m14s	ΣD=09m49s
	* * * * *
 21:35:03			d=05m20s 	
 21:40:28	West Triplet
 21:53:18	Int: 18m15s	d=04m25s 	
 22:13:21	Int: 20m03s	d=03m44s 	
 22:33:12	Int: 19m51s	d=03m52s 	
 22:51:44	Int: 18m32s	d=04m12s 	
 23:09:41	Int: 17m57s	d=03m27s 	
 23:27:14	Int: 17m33s	d=03m24s 	
 23:43:35	Int: 16m21s	d=03m38s 	
 00:01:25	Int: 17m50s	d=03m48s 	
 00:18:31	Int: 17m06s	d=03m50s 	
 00:39:55	West Triplet
		     Turban: 17m00s

It was foggy overnight, but that had burned off by the time to head out in the morning. Turns out I got out to Grand earlier than necessary, so went over to Geyser Hill just to take a look. Returned to Grand about an hour later.

Returned in time to see West Triplet start to erupt. May have also returned to a Turban Delay eruption, but not sure. In any case, it took nearly three hours for Grand to finally show signs of an imminent eruption. Once again, the waves on Grand took their time getting stronger, and Grand had several seconds of booping before the One Burst Eruption started. West Triplet finally started to erupt during Grand's eruption.

2026-May-27 : 11:16:36 T1Q

 11:15:34	Turban	-1m02s
 11:15:48	Vent Ovfl	-0m48s
 11:16:30	Boop	-0m06s
 11:16:36	B1	--- d=11m19s
 11:18:35	Vent	1m59s
 11:27:55	P1	11m19s
 11:29:08	V&T Quit	12m32s

				     	ΣD=11m19s
	* * * * *
 08:25:10			d=03m55s 	
 08:30:37	West Triplet d=02h52m 
 08:42:01	Int: 16m51s	d=03m57s 	
 08:59:51	Int: 17m50s	d=03m46s 	
 09:19:11	Int: 19m20s	d=04m09s 	
 09:37:58	Int: 18m47s	d=03m27s 	
 09:56:45	Int: 18m47s	d=03m53s 	
 10:16:53	Int: 20m08s	d=03m36s 	
 10:34:52	Int: 17m59s	d=03m42s 	
 10:53:33	Int: 18m41s	d=03m28s 	
		     Turban: 22m01s

And as seems to happen too often, Castle began to erupt right after Grand's eruption ended. This time it was a major. The sky was still mostly clear, making this the first really nice day of the trip, one that felt like summer was here.

In the afternoon, went out prepared for a long wait. It was a bit breezy and there were thunderstorms off in the distance. Wait through a couple of Turban intervals, and then the weather deteriorated. Wasn't much rain, but the wind suddenly got quite strong, so much so that I took down the camera tripod. That was also when we had the first Turban Delay interval.

Once the weather passed, it was nice again, with no wind and the sun out making it warm. It was also the first time I encountered mosquitoes this trip, and I had to deploy our special New Zealand sandfly repellant. (It's from Australia, and I don't think it's legal here, but it works well.)

We got our second Turban Delay on the second interval, and this time it was a minute longer than previous, and featured a small boop by Grand. Grand didn't even really start to fill until around the 22 minute mark.

So now it took another three Turban intervals before our third Turban Delay. Once again, Grand was low until around the 24 minute mark. This time Grand's pool didn't drop just before the start of Turban's eruption. After about twenty seconds, Vent began to overflow, but even then Grand took its time getting started, with a series of boops.

The One Burst Eruption abruptly stopped at the 8-1/2 minute mark. This should have resulted in at least another burst, but while water appeared in Grand's vent, it never started the heavy sloshing and rising that characterizes a refill. We did stick around for a bit to see if there would be any afterplay, but there wasn't any. West Triplet also started just before the end of Grand's eruption.

2026-May-27 : 19:59:40 D2/D3/D0/T1C

 19:58:59	Turban	-0m41s
 19:59:17	Vent Ovfl	-0m23s
 19:59:35	Boop	-0m05s
 19:59:40	B1	--- d=08m30s
 20:02:07	Vent	2m27s
 20:08:10	P1	8m30s
Vent & Turban continue

				     	ΣD=08m30s
	* * * * *
 17:03:16			d=04m39s 	
 17:23:04	Int: 19m48s	d=04m06s 	
 17:57:42	Int: 34m38s	d=04m31s  D0	
 18:15:42	Int: 18m00s	d=04m00s  D1	
 18:51:18	Int: 35m36s	d=05m31s  D2/D0 Boop: 18:48:16	
 19:08:52	Int: 17m34s	d=04m17s  D2/D1	
 19:27:02	Int: 18m10s	d=03m52s  D2/D2	
 20:07:13	West Triplet
		     Turban: 31m57s

I knew that Rift was erupting before I headed out in the morning.

Based on the strength of the overflow from Grand, the amount of time before Turban erupted after my arrival, and the long duration of the Turban eruption, I believe that was a Turban Delay interval. The next Turban eruption had no overflow, which fits. The Rift eruption ended shortly after the Delay Turban eruption.

The fourth Turban eruption after the delay wasn't all that powerful at the start, but slowly increase in power as the water level and overflow amounts in Grand increased. It took almost 2-1/2 minutes for Grand to finally start the One Burst Eruption.

2026-May-26 : 10:14:03 T1Q

 10:11:39	Turban	-2m24s
 10:14:03	B1	--- d=10m36s
 10:15:55	Vent	1m52s
 10:24:39	P1	10m36s
 10:25:31	V&T Quit	11m28s

				     	ΣD=10m36s
	* * * * *
 08:56:30			d=05m16s 	
 09:14:40	Int: 18m10s	d=03m30s 	
 09:34:58	Int: 20m18s	d=03m51s 	
 09:53:13	Int: 18m15s	d=03m31s 	
		     Turban: 18m26s

The call for the Indicator was for it in eruption. Despite this, I managed to get to Sulphide for the start of Beehive.

Them, before the rains, I went out to check on Daisy. Recently it seems that I've been seeing intervals well over two hours long, but this one was well under. The duration of the eruption was also nicely long, at 3m47s.

Managed to get out to Grand during a lull in the showers. I was there almost twenty minutes before Turban finally erupted. As with this morning, all the indications were that we had a Turban Delay interval. West Triplet also started to erupt shortly before Turban's start.

As with most Turban Delay intervals, there was now a series of undistinguished Turban eruptions. On the fifth, it looked for a while like Grand was going to try and erupt, but it dropped as Turban started.

It was the sixth Turban eruption where Grand filled, and then like this morning, it took a long time for Grand to finally start. With an abrupt end at just over eight minutes, it looked almost certain for a second burst. Even with all the steam, it could be seen that there was no attempt at a third burst, even though the eruption duration was only 9-1/2 minutes.

2026-May-26 : 18:23:00 D6/T2C

 18:21:20	Turban	-1m40s
 18:22:57	Boop	-0m03s
 18:23:00	B1	--- d=08m09s
 18:25:20	Vent	2m20s
 18:31:09	P1	8m09s d=39s
 18:31:48	B2	8m48s d=41s
 18:32:29	P2	9m29s
Vent & Turban continue

				     ΣB=08m50s	ΣD=09m29s
	* * * * *
 16:23:39	West Triplet
 16:31:16			d=04m17s  D0	
 16:48:51	Int: 17m35s	d=03m18s  D1	
 17:08:32	Int: 19m41s	d=03m53s  D2	
 17:26:56	Int: 18m24s	d=03m40s  D3	
 17:46:01	Int: 19m05s	d=03m31s  D4	
 18:03:30	Int: 17m29s	d=03m45s  D5	
		     Turban: 17m50s

That's when the rains started again, insuring a wet bike ride back to the cabin.

With all the shorter Grand intervals recently, I decided that 13 hours was a good interval for a double overnight interval. The overnight eruption was caught on the webcam, and my projected arrival time didn't change.

A nice clear morning, the first one of this visit. Got out to Grand in time to see heavy overflow, followed by a long Turban eruption, it appears that we had a Turban Delay interval. Four Turban eruptions later, Grand filled and never receded, giving us a nice, backlit One Burst Eruption. West Triplet started to erupt right after Vent & Turban quit. Didn't stick around for the end or a Rift eruption, as it was time to try the Lower Store's breakfast.

2026-May-25 : 09:27:12 T1Q

 09:26:56	Vent Ovfl	-0m16s
 09:27:01	Turban	-0m11s
 09:27:09	Boop	-0m03s
 09:27:12	B1	--- d=11m50s
 09:30:31	Vent	3m19s
 09:39:02	P1	11m50s
 09:39:43	V&T Quit	12m31s

				     	ΣD=11m50s
	* * * * *
 08:11:02			d=05m04s 	
 08:29:04	Int: 18m02s	d=04m16s 	
 08:48:48	Int: 19m44s	d=03m59s 	
 09:07:01	Int: 18m13s	d=04m09s 	
		     Turban: 20m00s

Then went out to catch Artemisia, which hadn't been seen since yesterday morning. Got down to Fan & Mortar and the activity had changed. Now Fan's Gold and High vents were active, while Main and Mortar's Bottom vent was quiet. High was erupting at least four meters high at times, and if Angle had also been active, it would have looked like an eruption was imminent. As it wasn, the activity died down.

Headed for Artemisia again, and this time got delayed by East Sentinel. The vent was dead calm, with only occasional slight ripples over the locations of the vents along the back side. There was considerable runoff, and it looked like it might be fluctuating. I took some video, and that's when Artemisia started to erupt.

So I headed back to Fan & Mortar, where High and Gold continued to look good. At some point Angle joined in, and again there was the appearance of the start of an eruption. For the next half-hour or so, those vents could cycle from quiet to quite strong.

By mid-afternoon our good weather had deteriorated to the point where I decided I'd better bring a jacket, which I ended up putting on shortly after I arrived at Grand.

West Triplet was in eruption as I was tying up my bike, and Turban erupted right after I arrived. Not surprised when Rift started about a half hour later. That eruption lasted well over 1-3/4 hours. At about 1-1/4 hours in, Turban had a Delay Eruption interval.

After that, the durations and intervals of the Turban eruptions got noticeably shorter, until the fifth eruption ended up being another Turban Delay interval. For this next series, the intervals were even shorter, with all but one under 17 minutes. They all seemed to have early fills of Grand's pool, which would then drop just before Turban started to erupt,

Then on the fifth interval, Grand was full at around 11-1/2 minutes and started having waves. These built up such that at 13 minutes, Turban started to erupt. Then Vent started to overflow, and finally a half minute later Grand started after a series of Boops. This Turban interval preceding Grand is one of the shortest I've ever seen.

Once again we had a One Burst Grand eruption, but for the last few minutes, the clouds parted and the eruption was illuminated by the setting sun. The duration was just over ten minutes, and despite being short, Vent & Turban quit.

2026-May-25 : 20:11:22 D5/D5/T1Q

 20:10:39	Turban	-0m43s
 20:10:46	Vent Ovfl	-0m36s
 20:11:15	Boop	-0m07s
 20:11:22	B1	--- d=10m06s
 20:13:33	Vent	2m11s
 20:21:28	P1	10m06s
 20:22:22	V&T Quit	11m00s

				     	ΣD=10m06s
	* * * * *
 15:13:41ie	West Triplet
 15:19:01			d=01m54s 	
 15:35:33	Int: 16m32s	d=03m25s 	
 15:47:04	Rift
 15:55:24	Int: 19m51s	d=03m22s 	
 16:14:40	Int: 19m16s	d=03m54s 	
 16:34:03	Int: 19m23s	d=03m42s 	
 17:06:38	Int: 32m35s	d=03m38s  D0	
 17:24:51	Int: 18m13s	d=03m11s  D1	
 17:42:29	Int: 17m38s	d=03m06s  D2	
 18:01:44	Int: 19m15s	d=02m31s  D3	
 18:19:30	Int: 17m46s	d=03m08s  D4	
 18:50:14	Int: 30m44s	d=04m11s  D5/D0	
 19:07:42	Int: 17m28s	d=03m06s  D5/D1	
 19:24:25	Int: 16m43s	d=03m28s  D5/D2	
 19:41:10	Int: 16m45s	d=03m45s  D5/D3	
 19:57:38	Int: 16m28s	d=03m08s  D5/D4	
		     Turban: 13m01s

Just as several of us walked up to our bikes, Castle started to erupt. By then the sun was even lower, and Castle was nicely illuminated. We were prepared to watch the eruption, but it was a minor that lasted less than four minutes.

Overnight the webcam picked up a Grand eruption at just over the six hour mark. So was out at dawn just in case there was another six hour interval. There wasn't, and instead ended up waiting over four hours through a couple of West Triplet eruptions. The second one resulted in the start of Rift. The wait started out overcast and foggy but above freezing. The sun tried to come out, but never really did.

It was a typical non-delay type of long wait. During the last couple of hours of the wait, Turban's eruption intervals got shorter. There were several below 17 minutes, and the Turban eruption duration prior to Grand's eruption was less than two minutes long.

2026-May-24 : 10:51:26 T1Q

 10:51:05	Vent Ovfl	-0m21s
 10:51:11	Turban	-0m15s
 10:51:16	Boop	-0m10s
 10:51:26	B1	--- d=11m02s
 10:53:58	Vent	2m32s
 11:02:28	P1	11m02s
 11:03:22	V&T Quit	11m56s
 11:09:47	V&T Restart	18m21s

				     	ΣD=11m02s
	* * * * *
 06:54:57			d=03m54s 	
 07:12:34	West Triplet d=36m12s
 07:15:14	Int: 20m17s	d=04m08s 	
 07:34:24	Int: 19m10s	d=03m19s 	
 07:51:06	Int: 16m42s	d=02m39s 	
 08:09:25	Int: 18m19s	d=03m48s 	
 08:27:59	Int: 18m34s	d=03m36s 	
 08:47:23	Int: 19m24s	d=03m54s 	
 09:07:26	Int: 20m03s	d=03m58s 	
 09:26:48	Int: 19m22s	d=03m22s 	
 09:43:32	Int: 16m44s	d=03m27s 	
 09:59:58	Int: 16m26s	d=03m49s 	
 10:07:19	West Triplet d>1h05m
 10:17:17	Int: 17m19s	d=03m04s 	
 10:34:24	Int: 17m07s	d=01m58s 	
 10:44:23	Rift
		     Turban: 16m47s

During the last hour of the wait the showers started, and then there were showers all afternoon, so it seemed like a good time to do some app bug fixing.

After an afternoon of occasional thundershowers, headed out to cool gray skies. The hour-and-a-half wait was uninteresting until the end. At around the 18 minute mark after the previous Turban eruption, Grand's pool, which had been looking poor, started to rise. For the next ten minutes the pool was at or near full, but never quite good enough. Then the pool surpassed the level from the previous fills. Vent overflowing and a series of boops and then we got another One Burst Eruption. As before, it seemed like Grand slowed down around the eight minute mark, and long ago it would have stopped at that point. Instead the jetting picked up a bit, and lasted another three minutes.

2026-May-24 : 18:48:10 D0/T1Q

 18:48:00	Vent Ovfl	-0m10s
 18:48:02	Boop	-0m08s
 18:48:07	Turban	-0m03s
 18:48:10	B1	--- d=11m22s
 18:50:35	Vent	2m25s
 18:59:32	P1	11m22s
 19:00:10	V&T Quit	12m00s

				     	ΣD=11m22s
	* * * * *
 16:42:01			
 17:02:54	Int: 20m53s	d=04m06s 	
 17:21:29	Int: 18m35s	d=03m59s 	
 17:41:32	Int: 20m03s	d=03m43s 	
 18:00:31	Int: 18m59s	d=03m23s 	
 18:18:13	Int: 17m42s	d=03m17s 	
 18:55:18	West Triplet
		     Turban: 29m54s

Shortly after Grand started, West Triplet also began to erupt. It seems that this year West Triplet can recover from Rift within one of Grand's eruption intervals.

Went out to Geyser Hill to enjoy the nicest weather since our arrival, on the off chance Beehive might eruption. It didn't, so I headed in to reconfigure and go back out to Grand.

Saw Turban erupting as I was tying down my bike. Fortunate, as this was followed a Turban Delay interval of over 32 minutes. That Turban eruption coincided with the eruption of Beehive.

An hour later, a visitor noticed a bear ambling across the flats to the north. It passed by Beauty, crossed the boardwalk and then headed off into the trees.

Grand finally had the One Burst Eruption after seven Turban eruption intervals ending with another Delay Interval. The wind was strong from the south and the start didn't seem that tall.

2026-May-23 : 12:22:52 D7/D0/G1C

 12:22:50	Boop	-0m01s
 12:22:52	B1	--- d=10m11s
 12:23:52	Turban	1m00s
 12:25:54	Vent	3m01s
 12:33:03	P1	10m11s
Vent & Turban continue

				     	ΣD=10m11s
	* * * * *
 09:27:11			
 09:59:10	Int: 31m59s	d=04m50s  D0	
 10:17:03	Int: 17m53s	d=04m10s  D1	
 10:37:09	Int: 20m06s	d=03m45s  D2	
 10:57:04	Int: 19m55s	d=04m01s  D3	
 11:17:21	Int: 20m17s	d=03m35s  D4	
 11:35:54	Int: 18m33s	d=03m39s  D5	
 11:53:21	Int: 17m27s	d=03m40s  D6	
		      Grand: 29m31s

Late evening it was back out to Grand with the expectation of a long wait. Had extra layers and the light, just in case. Turned out it wasn't necessary, as I only had to wait for one Turban eruption interval. At the start of that interval, West Triplet began to erupt, and Castle had a minor eruption during that time. Grand's pool had a nice, steady fill, and the One Burst Eruption without any Delay.

At around the 8-1/2 minute mark, Grand slowed down, acting like every jet was going to be the last one of the burst. It wasn't even a Big Sawmill mode. Then the activity picked up once any chance of a second burst was gone.

2026-May-23 : 18:44:37 G1Q

 18:44:31	Vent Ovfl	-0m06s
 18:44:34	Boop	-0m03s
 18:44:37	B1	--- d=10m23s
 18:44:48	Turban	0m11s
 18:47:46	Vent	3m09s
 18:55:00	P1	10m23s
 18:55:59	V&T Quit	11m22s
 19:05:42	V&T Restart	21m05s

				     	ΣD=10m23s
	* * * * *
 18:24:27			
 18:28:49ns	West Triplet
 19:17:01	Rift
		      Grand: 20m10s

I then waited for the start of Rift. It took its time, but 45 minutes into the West Triplet eruption, suddenly Rift started steaming and within a few minutes was in eruption. I didn't wait for West Triplet to end.

Instead went down basin for the first time this visit, and spent 40 minutes watching Fan & Mortar. There was no change during that time. River Vent was steaming the whole time. Bottom Vent was splashing strongly, but there was little runoff. Main Vent was strong and noisy, with some bursts and splashing well above the back rim, with heights up to two meters.

Turns out coming back in last night was a good idea. Grand erupted well after midnight with an interval of over eleven hours, with a Rift eruption during that time.

I didn't know that when I went out in the morning. Grand was in overflow, and Turban started shortly after I arrived. The duration was fairly short. Castle started a major eruption at the same time.

Grand had a One Burst Eruption with the next Turban eruption, with West Triplet starting near the end. I decided to stick around to get the duration, and make sure Rift didn't erupt. Turns out Rift did erupt, giving it an interval of less than 10 hours.

2026-May-22 : 08:09:30 T1Q

 08:09:12	Turban	-0m18s
 08:09:27	Vent Ovfl	-0m03s
 08:09:30	B1	--- d=11m18s
 08:12:32	Vent	3m02s
 08:20:48	P1	11m18s
 08:21:29	V&T Quit	11m59s
 08:42:38	V&T Restart	33m08s

				     	ΣD=11m18s
	* * * * *
 07:50:40			d=03m24s 	
 08:22:07ns	West Triplet
 08:55:24	Rift
		     Turban: 18m32s

Returned to the cabin, then decided to walk out via Geyser Hill to wait for Uncertain. I figured that there was a good chance that Beehive might be active in the next few hours. That way once the wait in the Sawmill Group was over, I could hang around on Geyser Hill for a while.

The wait for Uncertain wasn't long. Sawmill started shortly after I arrived, and that's when Uncertain started to splash heavily. Within ten minutes, it erupted, and both it and Sawmill ended their eruptions at the same time.

As usual, it was windy on Geyser Hill, and waited for about 45 minutes. Made the mistake of not waiting next to Aurum, as it erupted during that time.

Went back to the cabin for lunch, figuring I'd be out in the wind all afternoon at Grand, and could run out, as usual, for Beehive. Turns out no one called out the Indicator, and I only noticed the entry for the Indicator eight minutes after it started.

With three of the last four Grand intervals near six hours (the fourth was near twelve) I had to go out at the six hour mark. Over the next 2-1/2 hours, saw a mostly undistinguished series of Turban eruptions. The intervals slowly dropped from well over twenty minutes to less than eighteen. Then we got a Turban Delay interval.

Fortunately, Grand was able to erupt during that Delay, and it even had two bursts. The pool drained after the second burst, and there was never water visible after that.

2026-May-22 : 16:32:27 D0/G2C

 16:32:23	Boop	-0m04s
 16:32:27	B1	--- d=08m21s
 16:32:34	Vent Ovfl	0m07s
 16:32:47	Turban	0m20s
 16:35:13	Vent	2m46s
 16:40:48	P1	8m21s d=23s
 16:41:11	B2	8m44s d=01m01s
 16:42:12	P2	9m45s
Vent & Turban continue

				     ΣB=09m22s	ΣD=09m45s
	* * * * *
 14:10:10			d=03m57s 	
 14:30:50	Int: 20m40s	d=04m13s 	
 14:50:30	Int: 19m40s	d=03m30s 	
 15:09:22	Int: 18m52s	d=03m38s 	
 15:28:00	Int: 18m38s	d=03m26s 	
 15:46:05	Int: 18m05s	d=03m14s 	
 16:03:48	Int: 17m43s	d=03m30s 	
 16:32:01	West Triplet	d=37m00s
		      Grand: 28m39s

During the eruption, down by the Grand sign, there was a ground of people taking selfies. In turn, each one would step off the boardwalk and strike a stupid pose, as if they had accomplished something dramatic.

Near the start of Grand's eruption, West Triplet started. I stuck around to catch the end, just in case Rift had an even shorter interval. But while the West Triplet eruption seemed a bit long, it didn't trigger Rift.

As I was leaving, Bulger had its second observed major eruption of the day.

Overnight we got at least an inch of wet slushly snow. By dawn, there were still light snow showers, and a strong wind from the northwest. The walkway wasn't as slippery as I expected, probably because it was slush instead of ice.

Uncertain was gurgling with occasional splashes, so I spent about twenty minutes watching it, but nothing much changed during that time. So went over to Grand. Rift's runoff channel was snow-free, indicating it probably erupted in the last few hours. Arrived just in time to catch the start of a Turban eruption. That was followed by an almost 30 minute long Turban Delay interval.

With the wind, most of the steam was being pushed to the south so that Grand's pool was easily visible. Three Turban eruption intervals later, Grand filled nicely. Turban started, and then it appeared Vent was overflowing. It took Grand nearly a minute to start erupting, after a series of boops. The wind was still making the One Burst Eruption visible.

2026-May-21 : 08:02:16 D3/T1C

 08:01:23	Turban	-0m53s
 08:01:39	Vent Ovfl	-0m37s
 08:02:10	Boop	-0m06s
 08:02:16	B1	--- d=09m29s
 08:04:30	Vent	2m14s
 08:11:45	P1	9m29s
Vent & Turban continue

				     	ΣD=09m29s
	* * * * *
 06:41:47			d=03m06s 	
 07:11:09	Int: 29m22s	d=04m20s  D0	
 07:28:27	Int: 17m18s	d=03m46s  D1	
 07:44:58	Int: 16m31s	d=03m28s  D2	
		     Turban: 16m25s

Following the eruption, stopped in at Sawmill and Uncertain again. Sawmill's pool level was high, and Uncertain was having strong splashes. Then Sawmill started, quickly overflowing as Uncertain's activity seemed to die down. At that point I decided to head back in to warm up and dry out.

With Grand having several short intervals since we arrived, decided I should not delay my arrival. The weather was dry, but windy. I had just passed West Triplet when Grand boiled up, starting the One Burst Eruption. As with this morning, the best view was at the north.

2026-May-21 : 14:16:19 G1Q

 14:16:19	B1	--- d=11m17s
 14:16:27	Turban	0m08s
 14:19:21	Vent	3m01s
 14:27:36	P1	11m17s
 14:28:29	V&T Quit	12m09s
 14:40:06	V&T Restart	23m47s

				     	ΣD=11m17s
	* * * * *
 14:26:39	West Triplet	d=26m13s

West Triplet started near the end of the Grand eruption. I waited to see if Rift might start, but West Triplet had a duration less than necessary to trigger Rift.

With all the recent shorter intervals for Grand, I decided it was better to be there early. It was just before sunset, with a clear sky and a cold wind coming from the north. I arrived to find Grand in a heavy overflow, most likely a Turban Delay interval. West Triplet had also just ended an eruption.

Four Turban eruption intervals later, there was a second Delay interval. At that point, it was dark and frost was starting to form on the boardwalks. I decided it was time to head back in.

2026-May-21 : 20:12:35

 20:22:42			d=04m51s 	
 20:40:01	Int: 17m19s	d=03m46s 	
 20:59:42	Int: 19m41s	d=03m55s 	
 21:20:06	Int: 20m34s	d=03m33s 	
 21:48:57	Int: 28m51s	d=04m25s  D0	

Woke up shortly before the alarm, and within a minute or two got the Beehive Indicator call. This time I only made it to the Firehole River bridge before I heard the roar of Beehive's eruption. Did get as far as Anemone (both vents were erupting). Also, Little Squirt was in eruption, and the alter ground near the boardwalk was steaming heavily.

Went back to the cabin to reconfigure, then headed out to Grand as it was almost 15 hours since the eruption we saw yesterday. Arrived to find Grand in overflow. Turns out that, based on the secret NPS time, I probably saw first overflow.

For the next couple of hours, it was a series of undistinguished Turban eruptions. Finally, West Triplet started to erupt, and eruption that lasted over an hour. During the middle of that eruption, I again saw slight steam coming from the location of East Triplet. Finally, after about fifteen minutes of heavy steaming, Rift began its eruption.

That eruption only lasted about 46 minutes. Two Turban eruption intervals later, Grand had its first good overflow, and we got a steamy but backlit One Burst Eruption.

2026-May-20 : 10:10:04 G1Q

 10:10:00	Boop	-0m03s
 10:10:04	B1	--- d=10m59s
 10:12:58	Vent	2m53s
 10:21:04	P1	10m59s
 10:22:09	V&T Quit	12m04s

				     	ΣD=10m59s
	* * * * *
 06:33:35			d=43s 	
 06:49:49	Int: 16m14s	d=03m45s 	
 07:11:29	Int: 21m40s	d=04m26s 	
 07:31:11	Int: 19m42s	d=03m56s 	
 07:52:20	Int: 21m09s	d=04m15s 	
 08:07:49	West Triplet d=01h04m 
 08:12:28	Int: 20m08s	d=04m29s 	
 08:31:56	Int: 19m28s	d=03m54s 	
 08:49:27	Rift d≈46m
 08:50:41	Int: 18m45s	d=04m18s 	
 09:09:13	Int: 18m32s	d=03m40s 
 09:12:22	end West Triplet	
 09:28:32	Int: 19m19s	d=02m59s 	
 09:46:36	Int: 18m04s	d=03m20s 	
		      Grand: 23m28s

When to return to Grand was an open quesiton. I didn't want to go too early, as these long waits in the cold and wind are tiresome, but didn't want to miss a short interval. Settled on getting out at around the 6-1/2 hour mark. So Grand erupts at just over six hours. I'd just finished something to eat and was getting properly configured.

Instead I went out to wait for Uncertain. Sawmill had a short, no overflow eruption while I was watching and waiting for West Triplet to quit, and see if Rift would start. It didn't. Then Sawmill starts another eruption about 45 minutes later, this time getting strong and overflowing.

By this time Uncertain had been splashing and gurgling nicely, so three minutes later, it also erupted.

At that point it was getting colder and windier, and it looked like the precipitation could start soon.