| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 37262 |
29 Sep 2024 @ 1514 |
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Janet Jones |
Hotter than last week when it was completely green. This week it was much more clear, but there were still microbes on the side farthest from the boardwalk. |
| 37110 |
21 Sep 2024 @ 1144 |
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Janet Jones |
Collapsing Pool is below overflow and has turned green since I last saw it a week ago. It was below overflow last week as well when the microbes in the overflow channel were drying out. |
| 36468 |
19 Aug 2024 @ 1214 |
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Craigmon99 |
In overflow. Bright blue. Slightly murky. Boiling from multiple points. More vigorous in center |
| 36229 |
02 Aug 2024 @ 1803 |
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bhoppe |
overflowing out south side of pool |
| 35539 |
24 Jun 2024 @ 2033 |
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Craigmon99 |
Runoff now 20 feet down channel |
| 35534 |
24 Jun 2024 @ 1915 |
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Craigmon99 |
In overflow?? Runoff channel beginning to flow about 6 feet from pools edge .
Runoff channel as a whole is damp.. |
| 35532 |
24 Jun 2024 @ 1859 |
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Craigmon99 |
Boiling from 3 points inside the main crater. Majority of bubbles from center. About as much as Ledge Spring boiling |
| 35504 |
24 Jun 2024 @ 0647 |
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Craigmon99 |
Bubbling in many spots. Subaudible thumping noise |
| 26930 |
08 Jul 2023 @ 1613 |
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nails |
About two feet below overflow. Light blue water, bubbling in several places. Boardwalk railing sign says “Collapsing Spring” |
| 4315 |
14 Jun 2017 @ 1430 |
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JSJ |
162 degrees Fahrenheit (thermal camera reading). Bluish-colored pool (see attachment). Overflowing - runoff draining into Surging Spring. |
| 4309 |
13 Jun 2017 @ 1319 |
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Janet Jones |
Boiling harder than on my last visit on 9 June 2017. At 1348, the water started to wobble in the crater like Oval Spring in the Upper Geyser Basin can do. This only lasted less than a minute and when it quit, the boiling lessened for a short time before starting up again. |
| 4285 |
09 Jun 2017 @ 1010 |
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Janet Jones |
On the 4th it had quite a bit of green to it, but today it was turbid and very blue. |