|Note ID||Start Time (US/Mountain)||End Time (US/Mountain)||Entrant||Note|
||08 Jul 2023 @ 1613
||About two feet below overflow. Light blue water, bubbling in several places. Boardwalk railing sign says “Collapsing Spring”
||14 Jun 2017 @ 1430
||162 degrees Fahrenheit (thermal camera reading). Bluish-colored pool (see attachment). Overflowing - runoff draining into Surging Spring.
||13 Jun 2017 @ 1319
||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.
||09 Jun 2017 @ 1010
||On the 4th it had quite a bit of green to it, but today it was turbid and very blue.