| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 28009 |
04 Sep 2023 @ 1627 |
--- |
cb |
cloudy with a yellowish sulfur ring about 1' wide around the rim of the pool. Pool has a few bubbles breaking the surface |
| 27340 |
30 Jul 2023 @ 0833 |
--- |
ypcaribou |
Yellow lined pool, clear blue water, overall a jade color. Quite full. |
| 27295 |
28 Jul 2023 @ 2039 |
--- |
SantaFe108 |
3 point boil, murky green color. |
| 27173 |
23 Jul 2023 @ 1424 |
--- |
mhreed |
Light boil. Cloudy green. |
| 26946 |
08 Jul 2023 @ 1924 |
--- |
nails |
Bubbling in three spots, left center and right. |
| 26826 |
04 Jul 2023 @ 0858 |
--- |
MAB |
2 pt boil - North end and east side |
| 26360 |
16 Jun 2023 @ 0919 |
--- |
CrisG |
water receded to approx 1.5 ft from sign. light 3pt boil |
| 26319 |
14 Jun 2023 @ 1749 |
--- |
CrisG |
clear light yellow green water up to the front edge of the sign log. light 3 pt boil. |
| 25965 |
02 Jun 2023 @ 1032 |
--- |
Tara |
water level not quite up to bottom of sign. crater very yellow. |
| 25860 |
28 May 2023 @ 1949 |
--- |
SantaFe108 |
Green murky water with yellow band surrounding throat. Bubbling from three points. |
| 25662 |
21 May 2023 @ 1436 |
--- |
SantaFe108 |
Greenish murky water with bubbling at three points. Thick ring of yellow surrounding the throat. |
| 24401 |
15 Oct 2022 @ 0955 |
--- |
MAB |
Clear greenish water with 1.5ft of yellow on the edges - 3 pt boil |
| 24249 |
05 Oct 2022 @ 1224 |
--- |
cb |
Pool is low, 1.5 - 2' below the sign. Green in color with yellow sulfur dust accumulated all along the rim. Roiling boil over the vent on the east end of the pool and smaller bubbles in the center |
| 24081 |
24 Sep 2022 @ 1610 |
--- |
CrisG |
pretty yellow green color. clear with light boil. |
| 24082 |
24 Sep 2022 @ 1610 |
--- |
CrisG |
pretty yellow green color. clear with light boil. |
| 23960 |
20 Sep 2022 @ 1632 |
--- |
ypcaribou |
Thick yellow lining pool. Color overall looks emerald. Clear with bubbles in 2 spots. |
| 23498 |
31 Aug 2022 @ 1105 |
--- |
cb |
High, water level is about 1' away from the back side of its name log. Sulfery yellow/green with a boil on the edge closest to Mystic. |
| 23327 |
21 Aug 2022 @ 1101 |
--- |
ypcaribou |
Yellow lining walls of spring creating an emerald green, clear pool. |
| 23077 |
06 Aug 2022 @ 1127 |
--- |
cb |
little change, water level is up a few inches |
| 22982 |
02 Aug 2022 @ 1022 |
--- |
cb |
pool is down a few more inches than last observation, ~8" above the inner vent rim. the rim ledge is (and has been)covered in sulfur dust. pool is greenish/yellow with a 3" roiling boil in 5 spots that seem to follow a line from the east to the west end of the pool, dead center. FYI, a week ago it was calm, random occational bubbles, same color. |
| 22920 |
27 Jul 2022 @ 1615 |
--- |
MAB |
nearly full with a few sm bubbles - clear bluish color with yellow edges |
| 22317 |
04 Jul 2022 @ 1436 |
--- |
cb |
pool has dropped 1' since last observation. yellowish with a blooping boil at the end of the pool toward Echinus. |
| 22208 |
29 Jun 2022 @ 1359 |
--- |
cb |
pool level has dropped ~4" to just behind the sign log. Edges still are covered in sulfur dust. color yellowish green. bubbling on the east end of the pool. |
| 22116 |
25 Jun 2022 @ 1129 |
--- |
cb |
water level is basicly the same as last observation except it has more yellowy sulfur dust accumulated along the edges of the pool. 2 areas with a small boil breaking the surface. |
| 22092 |
23 Jun 2022 @ 1816 |
--- |
cb |
Mystic and Mud springs are at the high water mark! Mystic water is past the sign, yellowish in color with a small boil on east edge |
| 21606 |
31 May 2022 @ 1450 |
--- |
cb |
pool level is HIGH! Water fro the pool surrounds the name placard. water is clear with a sulfur dust along the edge of the vent. 2 very slight areas with convection, no boil. |
| 21328 |
16 May 2022 @ 1110 |
--- |
Tara |
Green color, looks like a lot of yellow on sides of crater. Water level high enough that the bottom of the name sign is submerged, maybe 6-8" above inner rim. |
| 21011 |
18 Apr 2022 @ 1719 |
--- |
MAB |
Full. Clear greenish water w yellow edges |
| 20299 |
04 Nov 2021 @ 1226 |
--- |
MAB |
yellowish edges with blue green middle - higher water - line of bubbles across the pool in 4 spots w the most action on the Northish end |
| 20055 |
19 Oct 2021 @ 1440 |
--- |
cb |
pool is VERY high with a roiling boil on the East end of the pool. color is blue/green |
| 19898 |
05 Oct 2021 @ 1201 |
--- |
MAB |
higher water - bloopy east side boil - light center boil and occasional bloop from under a ledge on south side |
| 19809 |
30 Sep 2021 @ 1233 |
--- |
cb |
pool is up higher than last observed. Up to the tip of the protruding rock on the east edge of the pool with a small boil right next to it. pool is a cloudy light blue green color. |
| 19698 |
23 Sep 2021 @ 1020 |
--- |
cb |
no change |
| 19606 |
16 Sep 2021 @ 1029 |
--- |
cb |
Water level is ~10" below the high water mark. Pool is a gray color with a 3" blooping boil on the south end. |
| 19370 |
08 Sep 2021 @ 1130 |
--- |
Tara |
Down ~2.5', yellowish murky water, light bubbling in front right corner |
| 18781 |
01 Aug 2021 @ 1012 |
--- |
cb |
pool is higher by a few inches, yellowy green in color with a boil in the side toward Tantalus |
| 18739 |
30 Jul 2021 @ 0730 |
--- |
ypcaribou |
Section of dead, red needled trees just past Mystic Spring on left (walking clockwise around loop). Don't recall seeing this in fall of 2020. |
| 18505 |
18 Jul 2021 @ 1047 |
--- |
cb |
Mystic, Mud & Yellow Spring pools are also much lower than previously viewed. |
| 18370 |
11 Jul 2021 @ 1442 |
--- |
cb |
no change from last observation. |
| 18282 |
05 Jul 2021 @ 1453 |
--- |
cb |
Mystic Spring, Mud & Yellow mud all look the same as last observed on 6/29. Yellow mud might be a tad lower. No longer any spray from Puff & Stuff geyser. |
| 18185 |
29 Jun 2021 @ 1321 |
--- |
cb |
same level. yellowish green with a vigorous boil on the edge toward Echinus. |
| 17575 |
08 Jun 2021 @ 1110 |
--- |
cb |
pool up a bit from last observation. Vigorous boil on east edge. yellow in color |
| 17278 |
30 May 2021 @ 1551 |
--- |
cb |
pool up slightly (a few inches) higher than the 6th. It's a sulfury yellow green color with a vigorous boil on the east and south side of the pool |
| 16394 |
10 Oct 2020 @ 1018 |
--- |
cb |
same as last observation. Yellowish with a few random bubbles breaking the surface. |
| 16341 |
06 Oct 2020 @ 1220 |
--- |
cb |
Water level is covering the shelf on the south east edge by ~2-3" of yellowish/green, clear water and occasional bubbles break the surface in this area. |
| 16272 |
26 Sep 2020 @ 1629 |
--- |
cb |
Mystics pool is high. 3" of water covers the shelf inside the pool on the south end of the pool. It is yellowish green, calm with occasional dime to quarter sized bubbles breaking the surface. |
| 15548 |
13 Aug 2020 @ 1026 |
--- |
cb |
pool is covering the shelf on the NE edge with about 4" of water and has a few random bubbles breaking the surface. color is yellowish green. pool is calm |
| 15658 |
03 Aug 2020 @ 1055 |
--- |
Tara |
With Steamboat in steam phase, Mystic Spring was down about 18" from the log on the west side and had slightly murky green-blue water. |
| 14526 |
03 Jun 2020 @ 1340 |
--- |
cb |
Pool is low, calm and has that sulfer yellow color at the edges to about 1' down into the pool and then deeper into the vent it becomes greenish. |
| 14502 |
01 Jun 2020 @ 1803 |
--- |
ypcaribou |
Clear, emerald blue |
| 13927 |
12 Oct 2019 @ 1230 |
--- |
cb |
water level is up to the sand on rhe west end of the pool. It is clear, greenish in color & no bubbles. |
| 13890 |
05 Oct 2019 @ 1210 |
--- |
cb |
pool is high, clear and occasional bubbles. |
| 13756 |
19 Sep 2019 @ 1220 |
--- |
cb |
light emerald green in color. Occasional bubbles on the east and west end of the pool. |
| 13254 |
14 Aug 2019 @ 1619 |
--- |
cb |
unchanged. ~2' below rim. greenish yellow with a boil on the east end of the pool. |
| 13125 |
09 Aug 2019 @ 0834 |
--- |
cb |
pool is low. water is just covering the rock outcropping/shelf of the NE rim. color is a cloudy greenish yellow. **Mud spring is very low! Down ~ 2.5' from the rim (not overflow). Pool is calm and cloudy greenish in color. ** Blue Mud Steam Vent water level is low. Splashing water is barely visable deep in the vent. |
| 12995 |
03 Aug 2019 @ 0835 |
--- |
cb |
yellowish green in color. 3 areas that have bubblers breaking the surface. |
| 12969 |
02 Aug 2019 @ 0936 |
--- |
MAB |
green yellow in color with fairly active bubbles |
| 12889 |
31 Jul 2019 @ 0854 |
--- |
cb |
light yellowish green in color and has a small roiling boil on the south end |
| 11022 |
20 Apr 2019 @ 1033 |
--- |
MAB |
Low water, appeared slightly cloudy but could have been steam. |
| 9833 |
22 Aug 2018 @ 1835 |
--- |
cb |
high (up to the log debris) and a yellow/greenish color. |
| 9130 |
11 Jul 2018 @ 0920 |
--- |
Tara |
Down about 18" and burbling to a gee inches. |
| 20472 |
07 Oct 2015 @ 1200 |
--- |
research-mab |
10/7/2015 – Water/liquid back up for Mystic & Crater
Yellow Funnel and Blue Mud still low. [generic day time] |
| 20469 |
05 Oct 2015 @ 1200 |
--- |
research-mab |
10/05/2015
Mystic, Green dragon, Crater & Yellow Funnel all MUCH lower liquid Blue Mud so low it sounds hollow as it bubbles deep. [generic day time] |
| 20587 |
03 Aug 2002 @ 1329 |
--- |
research-mab |
08/03/2002 WMoats listserv report: This is the first time that I've seen this pool erupt. It erupted from the northeastern side of the pool as short bursts a maximum of 3 ft high and three feet wide. The central and southwestern sides of the pool boiled, but there was no bursting activity from these parts of the pool. Eruptions started with strong boiling and 0.5 ft splashes that would build over several minutes into 2 ft bursts, with occasional 3 ft bursts. At their peak, the eruptions would last about a minute, then the eruptions would decline quickly. |
| 6041 |
23 Jul 1973 @ 1800 |
--- |
research-mab |
07/23/1973 Mystic Spring muddy – also Milky Complex, Basin Geyser |
| 20377 |
09 Sep 1972 @ 1200 |
--- |
research-mab |
09/09/1972
Mud Spring & “Yellow Green Pool” [Mystic] to the east have started to refill. [generic day time] |