| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 34553 |
14 May 2024 @ 1244 |
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Lizzysa |
Seems hotter with more bubbling |
| 33861 |
17 Jan 2024 @ 1602 |
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K.Cooper |
quite calm. still boiling but less than I've seen recently |
| 26082 |
06 Jun 2023 @ 1320 |
06 Jun 2023 @ 1325 |
aferrara |
pool-wide 6" boil, quitting by 1322, transitioning to sloshing against pool runs. 1323 boiling to a foot on left side of pool. Barely boiling at 1324. |
| 26013 |
04 Jun 2023 @ 1215 |
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Janet Jones |
Pulsing from Ear Spring followed by 6-8” boiling on the “left” side. Boiling died down briefly 5 min later and started again. When left sise increases, the right side dies down. |
| 25882 |
29 May 2023 @ 0855 |
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User34 |
Pool is pulsing and "clapping" into old runoff conduit in the back, much like Crystal does |
| 25791 |
26 May 2023 @ 0615 |
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Graham |
Still doing normal boils. |
| 25784 |
25 May 2023 @ 1713 |
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Graham |
Boiling has subsided to more closely resemble prior behavior. |
| 25769 |
24 May 2023 @ 1858 |
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Tara |
Still boiling constantly with occasional boils to 1 foot high. The bright orange bacteria that was in the channel next to the the boardwalk was mostly killed off except at the edges of the channels farther from the pool. |
| 25737 |
24 May 2023 @ 0634 |
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Graham |
Boiling a foot |
| 19966 |
12 Oct 2021 @ 1608 |
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Ben VL |
Kind of a large boil going on when I walked by. Left side of the pool to 5 or 6 inches. Died down after a bit. |
| 19652 |
19 Sep 2021 @ 1414 |
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Tara |
intermittent boiling on north end of pool |
| 16495 |
31 Oct 2020 @ 1127 |
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Janet Jones |
1 ft boil from “front left” vent. D= 15-20 seconds.0 |
| 15741 |
26 Aug 2020 @ 1335 |
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Janet Jones |
Ear Spring had a fresh runoff channel carved almost directly opposite of the spring on the boardwalk. Looked like it could have been from this morning. The other runoff channels looked like they have for some time. |
| 14551 |
05 Jun 2020 @ 2001 |
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William |
vigorous boil from 2 points along from rim of pool. hottest I have seen it this year. |
| 14242 |
26 May 2020 @ 1116 |
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Janet Jones |
Bubbling from the center of the pool in a line. |
| 13908 |
09 Oct 2019 @ 1401 |
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underarockphoto |
No snow within three feet. Small runoff rivulets behind it. |
| 10729 |
05 Nov 2018 @ 1322 |
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mhreed |
Two foot surge for ~20s. |
| 10589 |
08 Oct 2018 @ 1113 |
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Micah Kipple |
Surge to 2 feet |
| 10518 |
01 Oct 2018 @ 1643 |
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Micah Kipple |
2' surge from the center of the pool. |
| 10313 |
20 Sep 2018 @ 1821 |
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Betty |
Large boil for about 15 seconds as seen from the barrier at Arrowhead Spring |
| 10283 |
18 Sep 2018 @ 0945 |
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Micah Kipple |
Frequent surging minor eruptions 2-3' high from left front vent. Righthand vent in constant state of superheated boiling from flat to 2' |
| 10252 |
16 Sep 2018 @ 0734 |
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steve |
One piece of the sinter rim about 4X8 inches washed off during a strong boil. |
| 10250 |
16 Sep 2018 @ 0719 |
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steve |
Two peices of the sinter rim on the north edge are loose and may wash away. |
| 10242 |
16 Sep 2018 @ 0637 |
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steve |
No major eruption overnight. Still heavy bioling, occasionly to 2-3 feet. Overall the whole area on the west side of the hill looks like it did last night |
| 10231 |
15 Sep 2018 @ 2156 |
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Micah Kipple |
Cycling rapidly from 1-2 inches below ovf to sheeting heavy overflow accompanied by violent superheated boiling from two vents. The lefthand vent can reach up to 4 feet. |
| 9499 |
06 Aug 2018 @ 1842 |
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Micah Kipple |
Gravel washed to the boardwalk. Fresh runoff channels. |
| 8366 |
30 May 2018 @ 1157 |
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Janet Jones |
Nearly all microbes have been killed in the runoff channels. They’ve also been greatly reduced in Pendant Spring. |
| 4505 |
19 Jul 2017 @ 1238 |
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Janet Jones |
Ear Spring is significantly hotter than it was on my last visit (think that was on 11 July 2017). There's also a seep that's active along the "front left" edge (as you face it on the boardwalk). I watched sustained boiling in the center of the pool that lasted 30 seconds or so. |
| 3860 |
05 Nov 2016 @ 1117 |
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Janet Jones |
Area between the section of Ear Spring that normally bubbles along the edge and the boardwalk was wet out to about a foot. This is not in the normal overflow channel for Ear. |
| 3179 |
22 Jun 2016 @ 0935 |
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David |
Spring boiling from lower right corner (vent area being upper right corner) as viewed from bw. see: https://www.flickr.com/photos/ujelang/27942211472/in/dateposted-public/ |
| 3371 |
11 Jun 2016 @ 1212 |
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JSJ |
Thermal photography of pool recorded 190° F. |
| 1124 |
04 Aug 2014 @ 0000 |
04 Aug 2014 @ 2359 |
mhreed |
Activity seemed slightly more vigorous than usual. |