| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 31694 |
28 Nov 2023 @ 1300 |
--- |
JR |
Congress pool is no longer a mud pot….It is slightly murky blue-green colored water. A gentle bubbling in the middle. The pool is now approximately 20 feet across. It is filled so high that it is slightly overflowing into the Solfatara area. Gentle runoff channel can be seen going all the way into Colloidal pool. Wildly different from even just 3 weeks ago. I noticed this last week that it was full but it was too steamy to tell the details. It is now very clear and obvious that this feature has changed drastically from what we saw since April this year. |
| 29316 |
31 Oct 2023 @ 1720 |
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MAB |
Violent and Low - no seeming pattern to the bursting which could reach 1/3 up the crater |
| 29045 |
22 Oct 2023 @ 1258 |
--- |
SantaFe108 |
Churning muddy water at low pool. Locomotive Spring splashing. |
| 28982 |
21 Oct 2023 @ 1610 |
--- |
JR |
4 or more feet below rim. Strong muddy roil. Low even compared to mid summer. Observed constant roil as opposed to cycles. |
| 28884 |
19 Oct 2023 @ 1412 |
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DanS |
Active muddy boiling and churning |
| 28852 |
17 Oct 2023 @ 1619 |
--- |
MAB |
Violent chocolate milk color - last Sat the bigger bursts were all dark mud color - these are uniformly light brown |
| 28749 |
12 Oct 2023 @ 1705 |
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JR |
Water level fluctuations continue. Lower than a lot of this summer but not the lowest. Perhaps 3' below the brim. Strong roiling mud cycles continue every minute. |
| 29196 |
01 Oct 2023 @ 0905 |
--- |
research-mab |
10/01 - 0905am: - Congress Pool seems very hot, muddy, roiling cycles are every few minutes/30 seconds. Water level below 3 feet from rim |
| 28449 |
24 Sep 2023 @ 1446 |
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DanS |
Low, muddy with vigorous variable churning. |
| 29195 |
23 Sep 2023 @ 1200 |
--- |
research-mab |
9/23 - no time noted - Congress is very full & vigorously bubbling |
| 28300 |
17 Sep 2023 @ 1205 |
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SantaFe108 |
Churning muddy water to about ~4 feet every minute or so then calming down to a few inches high. |
| 28153 |
09 Sep 2023 @ 1050 |
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steve |
Congress Pool is erupting. The background is a steady bubbling/boiling to 2-4 feet but about once a minute it is more forceful to 6-10 feet, perhaps higher. |
| 29193 |
24 Aug 2023 @ 1200 |
--- |
research-mab |
8/24 - no time noted - - Congress filling, calm, then aggressive roil |
| 29197 |
23 Aug 2023 @ 1200 |
--- |
research-mab |
8/23 - no time noted - Incredible activity out of Congress Pool. High water level and gently boiling turned into a minor (eruption?) that ejected water 3-4 feet through a construction somewhat in the middle. Afterwards, the level was a ft lower – AC |
| 29192 |
16 Aug 2023 @ 1500 |
--- |
research-mab |
8/16 300 pm Congress water level 4” below stick, was active but became quiet – no bubbles 3 times/30 seconds |
| 29191 |
16 Aug 2023 @ 0900 |
--- |
research-mab |
8/16 9:00 am Stick still at Congress – very active |
| 27620 |
15 Aug 2023 @ 1543 |
--- |
cb |
pool still looks like thick chocolate milk with a violent roiling, bursting eruption up to ~8-10'. pool is very low in the vent |
| 29190 |
08 Aug 2023 @ 1200 |
--- |
research-mab |
8/8 - no time noted - Congress very high |
| 29189 |
07 Aug 2023 @ 1000 |
--- |
research-mab |
8/7 1000am Congress has really filled up |
| 29188 |
06 Aug 2023 @ 1200 |
--- |
research-mab |
8/6 - no time noted - Congress Pool is full! Seems to be recycling with several seconds of boiling activity followed by a few seconds of relative calm. |
| 29187 |
04 Aug 2023 @ 1200 |
--- |
research-mab |
8/4/2023 - no time noted - Unusual behavior out of Congress Pool. Short moments of aggressive boiling that shoots water a couple of feet high. May have a constriction? |
| 27364 |
31 Jul 2023 @ 1028 |
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MAB |
ugly violent low |
| 27342 |
30 Jul 2023 @ 0657 |
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ypcaribou |
Almost empty pool with gray, muddy water violently splashing from low in pool. |
| 27183 |
23 Jul 2023 @ 1743 |
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mhreed |
Diarrhea mode still engaged. Water level below the branch but having occasional bursts to mid-crater height. |
| 29199 |
14 Jul 2023 @ 1200 |
--- |
research-mab |
7/14 - no time noted - Congress was very extremely low! |
| 29198 |
13 Jul 2023 @ 1040 |
--- |
research-mab |
7/13 - Congress water level extremely low ~ 1040 am AC |
| 27009 |
11 Jul 2023 @ 1710 |
--- |
cb |
Congress' pool has dramatically dropped. Its water level is a few feet above the vent. It is chocolatey muddy brown color and erupting with aggressive 🤔churning, roiling bursts that splash to 5+ feet. |
| 29200 |
09 Jul 2023 @ 1200 |
--- |
research-mab |
7/9 - no time noted - Congress pool very low |
| 26869 |
06 Jul 2023 @ 1905 |
06 Jul 2023 @ 1913 |
nails |
Gray water boiling in low pool. Calms down about once per minute, then splashes back up 2 to 4 feet.. |
| 26840 |
04 Jul 2023 @ 1430 |
--- |
MAB |
lower with steady violent wide chocolate color boil |
| 29201 |
24 Jun 2023 @ 1000 |
--- |
research-mab |
6/24 1000-1100 rove - Congress Pool returning to a more normal water level but still roiling mud. |
| 26615 |
23 Jun 2023 @ 1125 |
--- |
cb |
pool is still a muddy chocolate brown, violently roiling boil ~4'. Not spiking to 15'+ like observed in the early spring. |
| 28948 |
16 Jun 2023 @ 1000 |
--- |
research-mab |
(no time given } 6/16
Congress pool still very active, no rest in sight. |
| 28734 |
11 Jun 2023 @ 1200 |
--- |
research-mab |
6/11 - no specific time
Congress Pool low but still aggressive mudpot |
| 25924 |
30 May 2023 @ 1120 |
--- |
MAB |
still violent near perpetual dark muddy splashing - some more voluminous and sustained - base water level may be lower than my previous visit - will compare photos |
| 25876 |
28 May 2023 @ 2138 |
--- |
SantaFe108 |
Low and furiously surging muddy water with occasional larger burst. Steam making flashlight hard to use. |
| 25651 |
21 May 2023 @ 1035 |
--- |
SantaFe108 |
Still low with constant surging of muddy water, occasional big burst as well. |
| 25517 |
18 May 2023 @ 1139 |
--- |
mhreed |
Low water level. Muddy with a constant, violent roil. Occasional bursts to height of crater rim. |
| 28731 |
04 May 2023 @ 1300 |
--- |
research-mab |
Congress Pool is currently a violent mudpot. Rising and lowering water level, shooting mud 5 feet or so
[no specific time] |
| 25044 |
27 Feb 2023 @ 1336 |
--- |
MAB |
blue green slightly murky but pretty - occasional ping pong bubbles |
| 24504 |
28 Oct 2022 @ 1600 |
--- |
MAB |
Low - green but not too murky with a few small bubbles |
| 24197 |
03 Oct 2022 @ 0927 |
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WillBoekel |
pool is low and a murky green |
| 29105 |
27 Sep 2022 @ 1200 |
--- |
research-mab |
9/27/2022 - no time noted - Congress looks low and blue |
| 24067 |
23 Sep 2022 @ 0945 |
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CrisG |
water level approx 1.5 ft from high water mark. water a milky teal color. quarter to half dollar sized bubbling. |
| 24068 |
23 Sep 2022 @ 0945 |
--- |
CrisG |
water level approx 1.5 ft from high water mark. water a milky teal color. quarter to half dollar sized bubbling. |
| 29104 |
18 Sep 2022 @ 1200 |
--- |
research-mab |
9/18/2022 - no time noted - Congress was low and clear |
| 23565 |
04 Sep 2022 @ 1330 |
--- |
cb |
pool is a murky seafoam green color, dime/half dollar sized bubbles breaking the surface ~ in the center. Water level is difficult to describe, ~1.5' below high water mark. |
| 29103 |
04 Sep 2022 @ 1200 |
--- |
research-mab |
9/04 /2022 - no time noted - Congress is low and not so murky |
| 29102 |
25 Aug 2022 @ 1200 |
--- |
research-mab |
8/25/2022 - no time noted - -Congress Pool getting murky again |
| 23369 |
23 Aug 2022 @ 1830 |
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MAB |
watery green - small bubbles in 2 spots |
| 29111 |
20 Aug 2022 @ 1200 |
--- |
research-mab |
8/20/2022 - no time noted - Congress is blue! |
| 29090 |
13 Aug 2022 @ 1200 |
--- |
research-mab |
8/13 - no time noted - Congress Pool blue & milky |
| 23057 |
05 Aug 2022 @ 1331 |
--- |
cb |
pool is higher than last observation by ~1'. It is a silty light brown/green color with just a few bubbles breaking the surface. mostly calm pool. |
| 22858 |
26 Jul 2022 @ 1212 |
--- |
cb |
pool is down another 1' from last note. down 3' from the high water mark along the edge. 2 vigorous boiling points and color is milk chocolate |
| 22663 |
17 Jul 2022 @ 1457 |
--- |
MAB |
2ft below top of cracked mud - dirty brown color w 5pt boil- heaviest boils on NW |
| 29077 |
08 Jul 2022 @ 1200 |
--- |
research-mab |
- no time noted - 7/8/22/2022 – Congress Pool and Scummy low water levels |
| 22399 |
08 Jul 2022 @ 1142 |
--- |
cb |
Pool down another 6", 2' below high water ring. It's milk chocolate color with a roil boil in the center and on the end by the bw |
| 22270 |
01 Jul 2022 @ 1337 |
--- |
MAB |
2 pt boil light brown in color - 1ft below cracked mud |
| 22245 |
30 Jun 2022 @ 1214 |
--- |
cb |
A tad more of a boil than last observation. 2 main roiling boils in front of the lg rock in the centerish area of the pool. roiling boil to 3". |
| 22164 |
27 Jun 2022 @ 1214 |
--- |
MAB |
steady boil mud puddle brown |
| 22121 |
25 Jun 2022 @ 1249 |
--- |
cb |
Pool is a latte light brown color, water is still high and it has 2 roiling boiling areas in the center of the pool. |
| 22079 |
23 Jun 2022 @ 1548 |
--- |
cb |
CHANGED again!! last time I looked at Congress it was turquoise blue! Now it is a .... ranger green color, kinda gray green & murky! Has a moderate boil & pool is down ~10" from last observation |
| 22075 |
15 Jun 2022 @ 1507 |
--- |
cb |
Change! The pool is a BEAUTIFUL turquoise blue color, clear with a 2 point bubbler (smaller than a boil) sending out small convection waves. water level is about 3' below the rim. |
| 29067 |
04 Jun 2022 @ 1200 |
--- |
research-mab |
6/4/2022 - no time noted - - Congress looking very blue instead of previous muddy/dark |
| 21707 |
03 Jun 2022 @ 1200 |
--- |
MAB |
color changed from my last view - more of a greenish blue and not mud puddle brown - fairly quiet |
| 21482 |
25 May 2022 @ 0755 |
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TSBryan |
very low, slight bubbling, slate gray water |
| 21445 |
23 May 2022 @ 1250 |
--- |
MAB |
stronger boil in several spots than last week and light mud puddle color water looks lower - will compare photos and edit |
| 21243 |
11 May 2022 @ 1240 |
--- |
MAB |
watery brown - not much boil |
| 21028 |
18 Apr 2022 @ 1252 |
--- |
MAB |
low - sizzly bubbles - light brown |
| 20339 |
07 Nov 2021 @ 1630 |
--- |
mwolf |
clear, blue, high, calm, zero bubbles |
| 20193 |
29 Oct 2021 @ 1711 |
--- |
MAB |
CLEAR blue green- can even see into the vent - water level is above that bottom level of deeply cracked mud |
| 20074 |
21 Oct 2021 @ 1412 |
--- |
mwolf |
clear, green, calm, with occasional little bubbles |
| 20045 |
19 Oct 2021 @ 1244 |
--- |
cb |
weird. Pool is a clear, greenish color much like Colloidal Spring. Hardly any boil just a random golf ball sized bubble that slowly makes it way to the surface and pops. Water level is about 6" below high water/mud line. |
| 19923 |
06 Oct 2021 @ 1602 |
--- |
cb |
pool is greenish brown, low water level and 2 very small bubblers |
| 19832 |
01 Oct 2021 @ 1750 |
--- |
MAB |
Low but NO boil - pool was in shadow but looked greenish brown |
| 19231 |
01 Sep 2021 @ 1603 |
01 Sep 2021 @ 1613 |
MAB |
separate VRs of varying water level - one said it was rising the other dropping - gave it 10 min and didn't aee anything other than variation from the heavy brown boil |
| 19114 |
27 Aug 2021 @ 1844 |
--- |
MAB |
brown water w strong boil o west end |
| 18884 |
10 Aug 2021 @ 1010 |
--- |
cb |
pool is much higher than I last observed. I find this feature so hard to describe pool level. Pool is 1.5' below the edge of the cracked/caked muddy rim. |
| 18443 |
14 Jul 2021 @ 1900 |
--- |
MAB |
LOWer still - well below the cracked mud at the bottom of the pit - strong boil with more intense action on the west edge |
| 18274 |
05 Jul 2021 @ 1555 |
--- |
cb |
Pool is very low. 4-5' below the gray muddy high water mark. Below the gray water mark is 4" of a tan water mark. it has a vigorous 1' boil on the edge closest to the boardwalk. |
| 18089 |
25 Jun 2021 @ 1125 |
--- |
MAB |
Low w/ 4ft of cracked mud exposed - center boil plus very strong boil on West side |
| 17452 |
04 Jun 2021 @ 1834 |
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MAB |
Water obviously dropped recently exposing 1.5 ft of cracked mud edges- dropped low enough to have a faint heart shape- color of wet cement brownish gray |
| 17282 |
30 May 2021 @ 1453 |
--- |
cb |
pool is higher than I've seen. Up to the smooth rim, boil on the north edge and in the center, color of milk chocolate |
| 17067 |
12 May 2021 @ 1817 |
--- |
MAB |
vigorous boil - mud puddle colored |
| 17033 |
09 May 2021 @ 1316 |
--- |
bbev |
vigorous 3 point boil in low, muddy pool. |
| 16940 |
28 Apr 2021 @ 1840 |
--- |
MAB |
Low mud-colored water w a 3 point boil |
| 16352 |
06 Oct 2020 @ 1511 |
--- |
cb |
Water level has come up ~6" since my last observation. It is still the color of milk chocolate with dark chocolate swirls and has a VIGOROUS roiling boil erupting to 1'+ on the edge of the pool closest to the boardwalk. Diameter of the boil is ~1'. |
| 16212 |
20 Sep 2020 @ 1714 |
--- |
cb |
I find describing water levels in Congress challenging! The pool is LOW. 2' Below it's high water/mud mark from earlier this summer. It has a vigorous roiling boil on the west end of the pool. It's the color of milk chocolate with dark chocolate swirls on the south end of the pool and has a putrid odor! There are 2 interesting features in the Solfatara area about 30' to the west of Congress pool. 2 areas of boiling springs/liquidy mud pots, each about a foot in diameter and about a foot apart, that are pinkish/orange in color. |
| 15790 |
29 Aug 2020 @ 1020 |
--- |
cb |
Pool is up about a foot from last observation. |
| 15556 |
13 Aug 2020 @ 1230 |
--- |
cb |
Wowza! Congress pool's water level has really dropped! Not sure how to describe it other than it is lapping at the bottom of the clayish features on the SE edge of the pool. water level is below the muddy line on the western edge of the pool and has 4" of exposed yellowish color on the edges above the water line. Color is still milk chocolate with dark chocolate swirls on the east edge. vigorous boil on the west end. |
| 15455 |
07 Aug 2020 @ 1156 |
--- |
cb |
Congress pool is slightly higher than last observed. It is a milky hot chocolate color with some dark chocolate swirls. It has a vigorous boil on the end of the pool closest to the boardwalk along with other smaller boils scattered around the pool. |
| 15027 |
18 Jul 2020 @ 0832 |
--- |
bbev |
Unchanged from yesterday with exception of the stick now floating in pool. |
| 15019 |
17 Jul 2020 @ 1138 |
--- |
bbev |
Pool is 6"lower than previously seen. Still has vigorous boil in muddy pool. |
| 14947 |
10 Jul 2020 @ 1330 |
--- |
cb |
Pool is very low & a murky milk chocolatey color with swirls of a dark chocolatey color toward the boardwalk. (best way i can describe it!) |
| 14874 |
04 Jul 2020 @ 1227 |
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bbev |
low, muddy, boiling pool. |
| 14598 |
11 Jun 2020 @ 1625 |
--- |
cb |
Congress pool is the color of muddy hot chocolate and has 3 roiling boiling points closest to the boardwalk. Pool is low in the crater. |
| 13429 |
27 Aug 2019 @ 1324 |
--- |
Betty |
Boiling from a low muddy pool |
| 13249 |
14 Aug 2019 @ 1522 |
--- |
cb |
pool is up a bit since last observation. Up to the stick on the south edge. Color is muddy brown; think hot chocolate. boiling in 2 areas on the west edge. |
| 13047 |
05 Aug 2019 @ 0905 |
--- |
MAB |
low churning light water |
| 12894 |
31 Jul 2019 @ 1030 |
--- |
cb |
vigorous boil. clay light brown in color. pool is higher than last observed by about 6" |