| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 40008 |
15 Jun 2025 @ 2217 |
15 Jun 2025 @ 2235 |
Siegmund |
No major during this time. |
| 36942 |
12 Sep 2024 @ 1600 |
12 Sep 2024 @ 1702 |
Micah Kipple |
Minors every 2-5 minutes, some fairly strong and partially filling the crater. It subjectively seemed like they were getting stronger but I had to leave when the rain and slush started getting stronger. |
| 36381 |
12 Aug 2024 @ 0630 |
--- |
LynnS |
Not in eruption when I arrived at 0630 |
| 28072 |
06 Sep 2023 @ 1257 |
06 Sep 2023 @ 1322 |
LynnS |
Periodic bursting leading up to the full pool eruption |
| 28071 |
06 Sep 2023 @ 1041 |
06 Sep 2023 @ 1233 |
LynnS |
Periodic bursting from an empty or partially full crater |
| 28070 |
06 Sep 2023 @ 0930 |
06 Sep 2023 @ 1021 |
LynnS |
Periodic bursting from an empty pool |
| 28068 |
06 Sep 2023 @ 0900 |
06 Sep 2023 @ 0917 |
LynnS |
Periodic bursting from a low pool |
| 28069 |
06 Sep 2023 @ 0730 |
06 Sep 2023 @ 0859 |
LynnS |
Not under observation |
| 28066 |
06 Sep 2023 @ 0700 |
06 Sep 2023 @ 0721 |
LynnS |
Cliff periodically bursting, leading up to the full pool eruption. |
| 26482 |
19 Jun 2023 @ 1346 |
--- |
Nikki |
er. Low Pool Eruption Began |
| 26480 |
19 Jun 2023 @ 1315 |
19 Jun 2023 @ 1333 |
Nikki |
ie. Low Pool Eruption |
| 23267 |
19 Aug 2022 @ 1233 |
--- |
SantaFe108 |
End of eruption. |
| 23266 |
19 Aug 2022 @ 1227 |
--- |
SantaFe108 |
Cliff's sign is missing from the boardwalk railing. |
| 19369 |
08 Sep 2021 @ 1433 |
--- |
Dave W |
Empty crater |
| 17762 |
14 Jun 2021 @ 0719 |
--- |
CraigC |
empty pool |
| 17504 |
06 Jun 2021 @ 1119 |
--- |
CraigC |
empty pool |
| 17035 |
09 May 2021 @ 1704 |
--- |
Micah Kipple |
First "Minor" following the end of the major eruption and draining of the crater. |
| 15985 |
04 Sep 2020 @ 1128 |
--- |
Janet Jones |
I watched a few cycles of Cliff while at Black Sand Basin today - and none of them reached overflow. The sinter on the "left" corner remained dry. It would splash like a normal cycle, and was extra splashy at the end of each cycle before draining, but the pool never filled to the rim. Rainbow Pool was in full overflow the entire time I was here as well. |
| 14243 |
26 May 2020 @ 1446 |
--- |
Janet Jones |
Watched a couple of cycles - it never filled to overflow. Bursts came about every minute with the final burst in the cycle lasting a bit longer. |
| 13830 |
18 Sep 2019 @ 1113 |
--- |
Gilbert |
Now empty |
| 5886 |
06 Sep 2017 @ 1856 |
--- |
Dave W |
Cliff off and pool completely empty. |
| 4799 |
04 Aug 2017 @ 1235 |
04 Aug 2017 @ 1747 |
JSJ |
Cliff Geyser active with usual mix of behaviors: full pool spouting, low pool spouting, and pauses. |
| 318 |
22 Jun 2012 @ 0000 |
22 Jun 2012 @ 2359 |
OneBad1dea |
Long |
| 12692 |
09 Jul 1994 @ 1400 |
09 Jul 1994 @ 1459 |
JarnoO |
14:xx |