| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 40131 |
28 Jun 2025 @ 1826 |
--- |
MAB |
quite full - clear w strong golf ball bubbles breaking from north alcove and smaller bubbles in east alcove |
| 39969 |
20 Jun 2025 @ 1741 |
--- |
MAB |
On the rise! Clear water up the collapsed shelf with about 1.5ft of the light part showing plus waters covering a few inches of the broken shelf rock - still strong action in north alcove and east side |
| 39863 |
13 Jun 2025 @ 1740 |
--- |
MAB |
7 point boil in N alcove - East side has a string of boils along the shelf - doesn't seem to be lots lower than 8th |
| 39833 |
13 Jun 2025 @ 0837 |
--- |
MAB |
still at base of rock not lower but hard to see - very steamy but noisy from north & east - water fairly clear |
| 39757 |
08 Jun 2025 @ 1807 |
--- |
MAB |
will ID new rocks to gage water drops but more boils particularly in north alcove |
| 39687 |
05 Jun 2025 @ 1749 |
--- |
MAB |
even more of the collapsed shelf still exposed - boils in N E and a little in center - clear green |
| 39585 |
31 May 2025 @ 1741 |
--- |
mhreed |
Boiling from multiple points. Clear/green in direct sunlight. |
| 39556 |
31 May 2025 @ 0750 |
--- |
ypcaribou |
Full and bubbling in usual spots. Water clear, yellow lining crater. |
| 39499 |
29 May 2025 @ 1742 |
--- |
MAB |
water lower than last visit exposing about a foot more of the light colored part of th collapsed shelf - part of that chunk of broken shelf now exposed too - boils in N and E alcove also with some grumbling boils coming from.. somewhere? |
| 39239 |
21 May 2025 @ 1454 |
--- |
MAB |
appears a bit lower just below the light band on that collapsed shelf- will compare photos- strongest activity is from north alcove |
| 38959 |
10 May 2025 @ 1658 |
--- |
MAB |
full! clear! boils North and East |
| 38806 |
03 May 2025 @ 1711 |
--- |
MAB |
clear and still very high - more boils from north alcove than east alcove in a short stop Edited to add - from Echinus doing my Notes it looks like a lake and boils from east alcove were plain to see |
| 38673 |
27 Apr 2025 @ 1813 |
--- |
MAB |
not quite as high - more vigorously boiling from east alcove - also boiling in center and north alcove |
| 38539 |
19 Apr 2025 @ 1647 |
--- |
MAB |
incredibly beautiful incredibly clear incredibly FULL - light boils in No and E alcoves |
| 38406 |
10 Apr 2025 @ 1155 |
--- |
SantaFe108 |
Water level 6 in below the top of collapsed sinter shelf. Clear, blue, and bubbling on the back side. |
| 37896 |
31 Oct 2024 @ 1649 |
--- |
SantaFe108 |
Low and murky, collapsed rim almost entirely exposed. Boiling in many places but mostly in the back center. Boiling is more intense than last week. |
| 37843 |
29 Oct 2024 @ 1710 |
--- |
MAB |
lots photos - will check for changes - seemed a little more active |
| 37808 |
27 Oct 2024 @ 1403 |
--- |
MAB |
clear - serious water drop! strongest boil in No alcove w lesser boil in east alcove & a few boil spots in center - collapsed sinter ledge 2/3 or even 3/4 above water |
| 37723 |
24 Oct 2024 @ 1545 |
--- |
SantaFe108 |
Has dropped! water level ~10in below rocks on left side. Clear and blue, boiling from numerous places. |
| 37645 |
19 Oct 2024 @ 1546 |
--- |
MAB |
FULL, clear - center boil & plus activity in east & north alcoves |
| 37474 |
10 Oct 2024 @ 1014 |
--- |
SantaFe108 |
Very high, barely seeping down the backside. Clear and blue, center-rear bubbling. |
| 37381 |
03 Oct 2024 @ 1534 |
--- |
SantaFe108 |
Full of clear, beautiful aqua colored water. 3 point boil in the back-center, tiny trickle of runoff seeping down the back side of its mound. |
| 37217 |
28 Sep 2024 @ 1636 |
--- |
cb |
pool has been high and clear all summer. level is just at the overflow rim. bubbles breaking the surface over both vents. no bubbles in the Alcove. |
| 36581 |
27 Aug 2024 @ 1844 |
--- |
cb |
pool still high but just a hair below overflow. clear, blue green, with baseball sized bubbles breaking the surface over both vents. no activity in the Alcove |
| 35847 |
11 Jul 2024 @ 1729 |
--- |
cb |
Pool is still VERY high and seeping out the backside toward Steamboat. (Water extends about 5' beyond the pool). water is greenish/blue and very clear. Softball sized bubbles break the surface over both vents. no activity in the Alcove. |
| 35428 |
21 Jun 2024 @ 1550 |
--- |
nails |
Clear , blue green with multiple areas roiling and bubbling |
| 35333 |
19 Jun 2024 @ 1026 |
--- |
Craigmon99 |
Clear and blue. Back and right vent both boiling |
| 35334 |
19 Jun 2024 @ 1026 |
--- |
Craigmon99 |
Clear and blue. Back and right vent both boiling |
| 35085 |
10 Jun 2024 @ 1243 |
--- |
SantaFe108 |
Full and clear, seeping out the back, center-rear boil. |
| 34997 |
08 Jun 2024 @ 1109 |
--- |
cb |
pool is clear, blueish green, VERY high and starting to overflow at the north end of the pool. (seeping about 4' over the edge of the pool) Several blooping boils over the north vents & southern vents. No activity in the Alcove area. |
| 34696 |
26 May 2024 @ 0738 |
--- |
ypcaribou |
Quite full. Alcove part of pool with broken shelf of deposit onleft about 6" out of water. So clear with the palest of cyan blue color. Spa-like. |
| 34542 |
13 May 2024 @ 1739 |
--- |
cb |
pool very high. very close to overflowing out the north edge. moderate bubbles over N & S vents. nada in the Alcove. pool clear. |
| 34265 |
19 Apr 2024 @ 1544 |
--- |
MAB |
FULL and clear - most boiling action in the north alcove - also some on east side - a few random boils in the center but didn't stay long |
| 33936 |
26 Jan 2024 @ 1537 |
--- |
JR |
A bit low, lots of bubbles. Clear. |
| 33910 |
24 Jan 2024 @ 1340 |
--- |
JR |
Bubbly throughout, clear and blue |
| 29034 |
22 Oct 2023 @ 0846 |
--- |
SantaFe108 |
Low and a murky blueish-gray, boiling in multiple places. Water level about 1½ feet below the left rocks. |
| 28967 |
21 Oct 2023 @ 1515 |
--- |
JR |
Very low, strong bubbling in back. Not very clear or blue. With all other observed activity, looking like possible disturbance in Back Basin. |
| 28931 |
20 Oct 2023 @ 1619 |
--- |
MAB |
clear - boils N&E alcoves plus a center boil |
| 28874 |
19 Oct 2023 @ 1131 |
--- |
DanS |
Multiple boils from two areas of pool. Medium water level. |
| 28761 |
14 Oct 2023 @ 1311 |
--- |
SantaFe108 |
Clear and blue, Full but no longer creeping down the slope. |
| 28780 |
14 Oct 2023 @ 1216 |
--- |
MAB |
super full with no visible boils in the N alcove - a little movement on the East |
| 28743 |
12 Oct 2023 @ 1600 |
--- |
JR |
No longer overflowing. Clear, decent bubbles. |
| 28723 |
09 Oct 2023 @ 1340 |
--- |
cb |
CS pool is back to a very high level & is overtopping on the northend end of the pool toward the old path. Runoff extends about 5' from the pool edge. Softball sized bubbles breaking the surface over both vents. no activity in the alcove. **Root pool is also VERY high & a milky light green color. |
| 28631 |
05 Oct 2023 @ 1142 |
--- |
cb |
pool has dropped 3-4" since my last observation. no longer overflowing out the north end. pool is clear with weak tennis ball sized bubbles just breaking the surface over the 2 vents. nothing from the Alcove. |
| 28008 |
04 Sep 2023 @ 1620 |
--- |
cb |
pool is at the same level as observed most of the summer. maybe a inch or 2 lower but still VERY HIGH! Softball sized bubbles breaking the surface in the usual places. pool is clear and blue |
| 27595 |
14 Aug 2023 @ 1530 |
--- |
cb |
pool is still VERY high & seeping over the north edge of the pool still. Activity over the vents has increased to bigger softball-basketball sized bubbles, height 3"-5" breaking the surface, and now the vent in front of the alcove area has bubbles breaking the surface. |
| 27519 |
11 Aug 2023 @ 1100 |
--- |
cb |
pool is still VERY high. Seeping a few feet over the rim on the north end of the pool toward the old pathway. (toward Steamboat) Tennis ball sized bubbles breaking the surface over the north & east vents. pool is clear & blue |
| 27299 |
28 Jul 2023 @ 2047 |
--- |
SantaFe108 |
*JUST* high enough to creep towards the slope, but not going down it. Boiling in back, right, and front of the pool. |
| 27164 |
23 Jul 2023 @ 1502 |
--- |
cb |
pool is at the same level, VERY high and close to seeping over its edge on the north edge of the pool. (toward the old walkway) softball + sized roiling boil, bubbles breaking the surface over the center, south & north vents of the pool. pool is clear and blue green in color |
| 27171 |
23 Jul 2023 @ 1421 |
--- |
mhreed |
Full, nearly in overflow. Bubbles coming up in multiple places. Clear. |
| 26967 |
09 Jul 2023 @ 1518 |
--- |
cb |
Still holding its VERY high pool level. Water level is creeping toward the old path on the north end of the pool (toward SB) Water is clear, blue/green with a few bubbles breaking the surface by the N & E ends of the pool. |
| 26941 |
08 Jul 2023 @ 1912 |
--- |
nails |
Very full of blue water. Most of the bubbling is in north end. |
| 26839 |
04 Jul 2023 @ 0848 |
--- |
MAB |
full full full clear water - boil in north alcove and east corner |
| 26310 |
14 Jun 2023 @ 1143 |
--- |
CrisG |
full, clear blue. light bubbing at rear of pool and occasional bubbles on right side of pool. |
| 25966 |
02 Jun 2023 @ 1042 |
--- |
Tara |
crater nearly full, water clear and blue with slight yellow tint. gentle bubbling over main vent and along east side. |
| 25857 |
28 May 2023 @ 1940 |
--- |
SantaFe108 |
Full and bubbling in many places with clear blue water. Water is ~3ft from the drop off the shelf on the right side. |
| 25665 |
21 May 2023 @ 1444 |
--- |
SantaFe108 |
Full with beautiful blueish water. Bubbling from several places. |
| 25462 |
15 May 2023 @ 1855 |
--- |
ypcaribou |
On approach, I whistled and said "That is one full Crater Spring!" Clear with hint of blue. Bubbling in at least 4 areas. Overflowing shelf on right to abt 3 feet out, water joined at both end of long deposit rock. |
| 24575 |
30 Oct 2022 @ 1632 |
--- |
ypcaribou |
Quite full including alcove. A lovely, light, sea glass green. Bubbling in the usual spots. Back Basin has a stronger stink than usual this afternoon. |
| 24245 |
05 Oct 2022 @ 1204 |
--- |
cb |
pool is down ~4". clear/ light greenish with a 6-8" blooping boil over the North pool & several blooping boils atound the nose on the east edge. There is a noisy gurgling sound like a boiling tea kettle somewhere around the rim of the north pool. |
| 24083 |
24 Sep 2022 @ 1617 |
--- |
CrisG |
water high enough that pooland alcove are connected around the wall between them. low boil over main vent and periodic blooping boil to the SE. Alcove is quiet. clear greenish colored water. |
| 24084 |
24 Sep 2022 @ 1617 |
--- |
CrisG |
water high enough that pooland alcove are connected around the wall between them. low boil over main vent and periodic blooping boil to the SE. Alcove is quiet. clear greenish colored water. |
| 23954 |
20 Sep 2022 @ 1602 |
--- |
ypcaribou |
Full such that alcove and pool are joined by water. Roiling in N end and periodic bubbling to SE. Clear water with yellow lining pool. |
| 23495 |
31 Aug 2022 @ 1042 |
--- |
cb |
continues to be VERY high. Water covers the nose and well into the beach to its south. ~6" boil over the main vent with smaller bubblers close by. Many ~2"-4" blooping vents around the the nose. no activity in the Alcove. water is clear & greenish. |
| 23420 |
27 Aug 2022 @ 1130 |
--- |
cb |
pool is up by ~4". covering 1/2 of the beach next to the nose. could be from recent rain |
| 23386 |
24 Aug 2022 @ 1105 |
--- |
cb |
water level is just about at the same level as my last report, at the nose. water is clear/greenish, no yellowish color or dust, steady roiling/blooping boil over north pool and around the nose. Alcove is quiet. |
| 23329 |
21 Aug 2022 @ 1122 |
--- |
ypcaribou |
Clear, light emerald green. Crater looks yellowish at edges (underwater). Boiling in NW vent and at SE edge.
Observed a group of about 10 including small children walk up and a tall male stepped over the Danger sign to have his photo taken. He joked about knowingly violating rules and that it's OK to do that sometimes. Everyone else in the group were yelling at him to get back on the path as he mocked the situation. They did keep him from walking up to the very edge (thus avoiding a slip and news headline). |
| 23105 |
08 Aug 2022 @ 1911 |
--- |
cb |
no change |
| 23049 |
05 Aug 2022 @ 1036 |
--- |
cb |
no change |
| 23009 |
03 Aug 2022 @ 1501 |
--- |
cb |
pool has dropped another ~2" and is now below the rocky beach & just at the nose. still has a roiling boil over the 2 vents in the pool. Alcove is calm. water is clear and blue green |
| 22979 |
02 Aug 2022 @ 1005 |
--- |
cb |
pool is down ~2". just covering the nose on the edge of the pool toward Echinus. color is blue and clear. rolling boil over both vents |
| 22957 |
31 Jul 2022 @ 1110 |
--- |
cb |
pool is still very high! water is partially covering the "nose" and 1/2 way into the beach of rocks next to it. water is crystal clear with roiling boil in the typical places |
| 22780 |
22 Jul 2022 @ 1127 |
--- |
cb |
pool has come up another ~2" and is now completely covered the "nose" rock on the edge of the pool toward Echinus. water is clear with a roiling boil over the north pool (edge) & the east edge (toward Echinus) pool is almost at the same height as noted early this spring. |
| 22735 |
20 Jul 2022 @ 1811 |
--- |
cb |
pool has come up ~10 "-1' since my last observation! Water is covering the "nose" by 3" on the edge towards Echinus. water is clear with a slight 3" blooping boil over north pool. Alcove and main pool are connected with a channel of water. |
| 22565 |
14 Jul 2022 @ 1320 |
--- |
cb |
water level has come up ~4". Rock outcroping in the pool closest to the boardwalk is covered with 3" of water. Vigorous roiling/BLOOPING boil over the NP & many small boils on the edge toward Echinus. water is clear & blueish |
| 22493 |
11 Jul 2022 @ 1634 |
--- |
cb |
pool has come up a inch or so. water is clear, green with a typical boil. not the vigorous boil its had |
| 22361 |
06 Jul 2022 @ 1143 |
--- |
cb |
Pool is at basically the same level. Rocky outcropping that's in the pool toward the path has the top of it exposed. Vigorous 1' boil over the north pool & smaller boils on the edge towards Echinus. Alcove has blips to 3". color is no longer muddy brown, it's clearer and more blue. |
| 22314 |
04 Jul 2022 @ 1430 |
--- |
cb |
pool dropped ~4" |
| 22206 |
29 Jun 2022 @ 1351 |
--- |
cb |
only change is the color of the water is darker muddy brown. |
| 22181 |
28 Jun 2022 @ 1511 |
--- |
cb |
pool is basically at the same level, same play/boil but a muddier brown color. |
| 29075 |
28 Jun 2022 @ 1200 |
--- |
research-mab |
- no time noted - 6/28 Crater Spring brown & bubbling – JT |
| 22144 |
26 Jun 2022 @ 1902 |
--- |
cb |
CS pool has dropped another few inches. It is a cloudy muddy color and has a vigorous blooping boil over both vents. Blooping to ~6-8" over the NP with many active vents around it |
| 22115 |
25 Jun 2022 @ 1117 |
--- |
cb |
Pool has dropped a good 4" in the past 48 hours. It is a bit more cloudy with a yellowish/blue tint. North end of the pool has a substantial vigorous 8" roiling blooping boil as does the south east edge by the "nose". Alcove has an occational tennis ball sized bubble breaking the surface. There is a bw plank in the alcove edge of the pool. |
| 21901 |
10 Jun 2022 @ 1157 |
--- |
novakg |
Crater Spring was in a rolling boil during Steamboat's eruption. |
| 21604 |
31 May 2022 @ 1431 |
--- |
cb |
water level is HIGH, Alcove & the main pool are connected at the broken rim . Blooping boils on the north and SE edge. pool is clear with a greenish tinge. |
| 21327 |
16 May 2022 @ 1100 |
--- |
Tara |
Water level just high enough for the main pool and the west vent to be connected. Greenish color, strong boil over the main vent area. |
| 21177 |
05 May 2022 @ 1330 |
--- |
cb |
water level is VERY high. Covers the "nose" on the end of the pool toward Echinus. water is clear w a yellowy tint. Boils over the north & south vent with a small bubbler by the rock in front of the Alcove |
| 21075 |
24 Apr 2022 @ 1634 |
--- |
DanS |
5 point boil near full pool. |
| 21007 |
18 Apr 2022 @ 1728 |
--- |
MAB |
about half full well around the collapsed sinter chunks - boils on N end - smaller bubbles on E side - Clear |
| 20986 |
15 Apr 2022 @ 1559 |
--- |
mwolf |
water level quite high |
| 20288 |
04 Nov 2021 @ 1320 |
--- |
cb |
no change |
| 20269 |
03 Nov 2021 @ 1145 |
--- |
cb |
Both pools are a few inches lower than last observation. The rock ledge that separates the 2 pools has ~3" of exposed rock. North pool has a vigorous 1.5-2' continuous boil with no variation. Alcove rises and falls a few inches, no splashing |
| 20146 |
27 Oct 2021 @ 1235 |
27 Oct 2021 @ 1250 |
cb |
Water level in both pools is connected and covering the shelf of rocks that earlier this summer were exposed and separated the Main pool from the active North pool. North pool has a consistent vigorous roiling boil to 2' from 3 main areas. Water is clear and no longer steel gray. Main pool still has apple sized bubbles along the east edge. Alcove has some minimal fluctuation in water level. no boil observed. |
| 20058 |
19 Oct 2021 @ 1452 |
--- |
cb |
main pool has come up a few inches and is connected with the North pool. North pool is still in a consistent vigorous roiling boil, occasionally increasing in vigor but mostly the same intensity. Alcove is just bubbling |
| 20021 |
17 Oct 2021 @ 1630 |
--- |
MAB |
low - continuous vigorous boils from 3+ venta in North alcove |
| 19925 |
06 Oct 2021 @ 1644 |
--- |
cb |
same as last observed except water level in both pools is up ~3". North pool in constant vigorous boil to ~1.5'. Alcove raising and falling with some 6" splashes at times. North & Main pool are consistently at the same level. Bigger grapefruit sized bubbles breaking the surface in the main pool |
| 19808 |
30 Sep 2021 @ 1211 |
--- |
cb |
np is still in a constant boil. |
| 19759 |
27 Sep 2021 @ 1105 |
--- |
cb |
No change. North pool is still in constant vigorous boil 8"- 1'. |
| 19746 |
26 Sep 2021 @ 1447 |
--- |
cb |
No cycling of majors or minors just a steady, consistent, vigorous boil from the north pool to about 1'. Main pool has come up a few inches with the same 5 apple sized boils. It is just a few inches below the north pools level and It is a green gray color. Alcove water level stays at the same place with a audible bubbling sound. |
| 19696 |
23 Sep 2021 @ 0957 |
23 Sep 2021 @ 1017 |
cb |
Not any change since last observation. North Pool is in constant, vigorous roiling boil. Main pools water level is very low (3" below North pool) and has 5 apple sized boiling points that break the surface along the south east edge of the pool. Alcove water level rises and falls ~2" but no splashes or eruption. Pool color is still a murky gray color. |