Last Known Eruption
1d 13h 19m ago

Latest Eruptions

Eruption DurationInterval
26 May 2023 @ 1524 ie8h 24m
26 May 2023 @ 0700 ie>2h 5m 1d 10h 16m
24 May 2023 @ 2044 ie2d 3h 9m
22 May 2023 @ 17351h 43m
22 May 2023 @ 1552 ie1d 2h 44m
21 May 2023 @ 1308 ie6h 1m
21 May 2023 @ 0707 ie10h 47m
20 May 2023 @ 2020 ie1d 5h 11m
19 May 2023 @ 1509 ie>4h 20m 2h 51m
19 May 2023 @ 12181h 4m 3h 22m
19 May 2023 @ 0856 ie>2h 3m 13h 35m
18 May 2023 @ 1921 ie23h 10m
17 May 2023 @ 20111h 44m
17 May 2023 @ 1827 ie6h 5m
17 May 2023 @ 1222 ie>3h 49m 2h 19m
17 May 2023 @ 1003~54m 1h 32m
17 May 2023 @ 0831 ie14h 5m
16 May 2023 @ 1826 ie22h 16m
15 May 2023 @ 2010 ie9d 2h 26m
06 May 2023 @ 1744 ie2h 9m
06 May 2023 @ 1535 ie1d 21h 13m
04 May 2023 @ 1822 ie4d 3h 39m
30 Apr 2023 @ 1443 ie2h 31m
30 Apr 2023 @ 1212 ie4d 3h 52m
26 Apr 2023 @ 0820 ie16h 21m
25 Apr 2023 @ 1559 ns2d 5h 58m
23 Apr 2023 @ 1001 ie96d 22h 10m
16 Jan 2023 @ 1051 ie18h 34m
15 Jan 2023 @ 1617 ie3h 41m
15 Jan 2023 @ 1236 ns19h 24m
14 Jan 2023 @ 1712 ie7h 37m
14 Jan 2023 @ 0935 ns~3h 44m 2h 7m
14 Jan 2023 @ 0728 ie14h 8m
13 Jan 2023 @ 1720 ie2h 55m
13 Jan 2023 @ 1425 ie6h 19m
13 Jan 2023 @ 080620h 9m
12 Jan 2023 @ 1157 ie22h 37m
11 Jan 2023 @ 1320 ie5h 54m
11 Jan 2023 @ 0726 ie22h 8m
10 Jan 2023 @ 09181h 27m
10 Jan 2023 @ 0751 ie18h 26m
09 Jan 2023 @ 1325 ie5h 52m
09 Jan 2023 @ 0733 ns15h 20m
08 Jan 2023 @ 1613 ie70d 53m
30 Oct 2022 @ 1620 ie21h 15m
29 Oct 2022 @ 1905 ie30d 2h 53m
29 Sep 2022 @ 1612 ie1h 52m
29 Sep 2022 @ 1420 ie7h 20m
29 Sep 2022 @ 0700 ie1d 13m
28 Sep 2022 @ 0647 ie15h 15m
27 Sep 2022 @ 1532 ie1d 3h 58m
26 Sep 2022 @ 1134 ie17h 58m
25 Sep 2022 @ 17366h 52m
25 Sep 2022 @ 1044 ie1d 3h 45m
24 Sep 2022 @ 0659 ie1d 16h 52m
22 Sep 2022 @ 1407 ie5h 55m
22 Sep 2022 @ 0812 ie>3h 47m 1d 30m
21 Sep 2022 @ 0742 ie12h 9m
20 Sep 2022 @ 1933 ie11h 36m
20 Sep 2022 @ 0757 ie17h 54m
19 Sep 2022 @ 14035h 50m
19 Sep 2022 @ 081322h 16m
18 Sep 2022 @ 0957 ie17h 33m
17 Sep 2022 @ 1624 ie1d 1h 30m
16 Sep 2022 @ 1454 ns1h 37m
16 Sep 2022 @ 1317 ns~38m 5h 40m
16 Sep 2022 @ 0737 ie17h 44m
15 Sep 2022 @ 1353 ie6h 41m
15 Sep 2022 @ 0712 ie23h 6m
14 Sep 2022 @ 0806 ie13h 38m
13 Sep 2022 @ 1828 ie6h 23m
13 Sep 2022 @ 1205 ie>2h 52m 4h 41m
13 Sep 2022 @ 0724 ns21h 15m
12 Sep 2022 @ 1009 ie20h 28m
11 Sep 2022 @ 13412h 32m
11 Sep 2022 @ 11091h 15m 2h 54m
11 Sep 2022 @ 0815 ns19h 35m
10 Sep 2022 @ 12403h 45m 6h 29m
10 Sep 2022 @ 0611 ie5h 59m
10 Sep 2022 @ 0012 ie9h 23m
09 Sep 2022 @ 1449 ie7h 49m
09 Sep 2022 @ 0700 ie1d 12h 48m
07 Sep 2022 @ 1812 ie wc2h 46m
07 Sep 2022 @ 1526 ie1h 56m
07 Sep 2022 @ 1330 ? ns wc7h 1m
07 Sep 2022 @ 0629 ie11h 27m
06 Sep 2022 @ 1902 ie1d 3h 46m
05 Sep 2022 @ 1516 ie7h 21m
05 Sep 2022 @ 0755 ns5h 4m 11h 47m
04 Sep 2022 @ 2008 ie>2h 14m 4h 29m
04 Sep 2022 @ 1539 ie4h 22m
04 Sep 2022 @ 1117 ie4h 53m
04 Sep 2022 @ 0624 ie17h 35m
03 Sep 2022 @ 1249 ie23h 35m
02 Sep 2022 @ 1314 ie1d 47m
01 Sep 2022 @ 1227 ie19h 37m
31 Aug 2022 @ 1650 ie5h 48m
31 Aug 2022 @ 1102 ie19h 26m
30 Aug 2022 @ 1536 ie1d 4h 46m
29 Aug 2022 @ 1050 ie1d 15h 18m

Interval Statistics

Interval Count100
Min1h 27m
Max96d 22h 10m
Mean2d 17h 14m
Median13h 51m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
25672 21 May 2023 @ 1619 --- Graham Quit now. Water rose in Penta, Oval, and Spasmodic after Sawmill quit which was odd.
25345 06 May 2023 @ 1726 --- SantaFe108 Ended before this time.
25321 04 May 2023 @ 2019 --- Ajw Very strong boiling action in all 3 pools. Water also shooting out of 11 little vents towards the front of the left pool.
25283 30 Apr 2023 @ 1258 --- SantaFe108 Off before this time.
25256 27 Apr 2023 @ 1335 27 Apr 2023 @ 1410 DanS From high pool had at least 8 failed start attempts from various vents during Tardy long eruption. Thumping Hole was ie the entire time.
24920 16 Jan 2023 @ 1220 --- Graham Quit about now. Almost got to overflow.
24898 14 Jan 2023 @ 1319 --- Graham Quit about now.
24891 14 Jan 2023 @ 0812 --- Graham Looks like it overflowed earlier as there is no fresh snow in the runoff channel. 0759 still ie, both pools high and calm. Quit 0812.
24881 12 Jan 2023 @ 1539 --- Graham Quit recently.
24849 08 Jan 2023 @ 1639 --- Graham Quit now
24427 16 Oct 2022 @ 1712 --- SantaFe108 End of eruption.
24175 01 Oct 2022 @ 0745 --- Graham Recently quit. Sawmill still ie. Twilight dropping.
24154 29 Sep 2022 @ 0742 --- Graham End time
24011 22 Sep 2022 @ 1920 22 Sep 2022 @ 1935 CrisG playing from back vents only on arrival. by 1935, pools had drained
23997 22 Sep 2022 @ 1159 --- Graham End time.
23990 21 Sep 2022 @ 1057 --- Betty Almost all vents are empty
23873 16 Sep 2022 @ 1931 --- Graham Off before now.
23856 16 Sep 2022 @ 1128 --- Graham Quit at this time.
23844 15 Sep 2022 @ 1720 --- Graham Quit at this time.
23814 14 Sep 2022 @ 1054 --- Graham Quit at this time.
23793 13 Sep 2022 @ 1457 --- Graham Quit at this time.
23784 13 Sep 2022 @ 0650 --- Graham Looked ie but then off 0652. Nay have just been bursting from pools as it started not long after.
23773 12 Sep 2022 @ 1105 --- Stephen_Gemar Quit before 11:05
23733 11 Sep 2022 @ 1741 --- Graham off by 1741. Twilight going down.
23732 11 Sep 2022 @ 0951 --- Graham Quit at this time.
23712 10 Sep 2022 @ 1625 --- Graham Quit at 1625.
23700 10 Sep 2022 @ 0817 --- Graham End time
23686 09 Sep 2022 @ 1837 --- Graham Quit around now. Twilight dropping. Sawmill still ie.
23581 05 Sep 2022 @ 1259 --- User34 Both pools quickly drained. Left pool went from a foot below overflow to out of sight. Vent on front wall of right pool started cyclically jetting to the left almost horizontally
25200 25 Aug 2022 @ 1802 --- Craigmon99 Rumbling
23339 21 Aug 2022 @ 1711 --- Craigmon99 Pools low. Center vent erupting
23295 20 Aug 2022 @ 1050 --- Brando Down 3 feet with vigorous boiling
22001 17 Jun 2022 @ 1509 --- RMichaels Spasmodic just in overflow with only a few vents splashing. Started dropping 1512.
21886 10 Jun 2022 @ 1015 --- RMichaels Reached overflow at 1015 while ie. Dropped at 1024..
21794 06 Jun 2022 @ 1659 --- Graham Off by now. Group draining. Sawmill still ie.
21535 27 May 2022 @ 1357 --- Graham In overflow now.
21530 27 May 2022 @ 1212 --- Graham Just went into overflow.
21469 24 May 2022 @ 2005 --- Ajw All pools fully drained. Can hear some water sloshing in right side pool.
21367 19 May 2022 @ 1804 --- Graham Pools joined. Penta pooling water too.
21159 03 May 2022 @ 1930 --- Ajw North (left) pool fully drained South (right) pool very low water, with steam and churning. Central vent also drained.
21136 30 Apr 2022 @ 1535 --- User34 Water completely out of sight
20724 18 Jan 2022 @ 1029 --- Graham End 1029
20691 14 Jan 2022 @ 1646 --- Graham In deep drain with Twilight Spring. Sawmill still ie.
20679 12 Jan 2022 @ 1031 --- Graham Off now except right pool front vent doing angled splashing.
20012 17 Oct 2021 @ 0900 --- aferrara No visible water
19785 29 Sep 2021 @ 1109 --- Graham Drained deep.
19166 30 Aug 2021 @ 1335 --- Graham 1335 approx end time.
19102 27 Aug 2021 @ 1148 --- Graham Quit 1148
18841 05 Aug 2021 @ 1829 --- TinaN Water too low to see in either pool at start of Sawmill
18435 15 Jul 2021 @ 1217 --- Micah Kipple Front vents shut down. Eruption end.
18416 14 Jul 2021 @ 0707 --- SteveO Right pool overflowing into left pool. Left pool down 12 inches.
18405 13 Jul 2021 @ 0637 --- SteveO Right vent down about 2 feet and bursting. Left vent down about 4 feet and boiling vigorously.
18396 12 Jul 2021 @ 1830 --- SteveO Draining.
18383 12 Jul 2021 @ 0915 --- Tara Bubble shower vent active
18247 02 Jul 2021 @ 1752 --- Graham Not erupting
18101 26 Jun 2021 @ 0755 --- Graham Approx end time.
18034 22 Jun 2021 @ 2009 --- Tara water levels recovering from drain in group (Spasmodic, Oval, Thumping Hole, Dog Bone, Penta, Sawmill, Tardy). Parasite vent cycling through moderate to strong splashing.
18005 22 Jun 2021 @ 0952 22 Jun 2021 @ 1007 ldgordon Right pool almost out of sight, parasite exposed in left pool. Churn and oval continue to drop. Twilight remains at normal level
18004 22 Jun 2021 @ 0928 --- ldgordon New back bubbles turned on.
17985 21 Jun 2021 @ 2030 21 Jun 2021 @ 2103 ldgordon Water rising, front part of right pool vigorously boiling to ~a foot.
17978 21 Jun 2021 @ 1550 --- K.Cooper Low, very low.
17960 21 Jun 2021 @ 1210 --- Tara reached overflow
17955 21 Jun 2021 @ 1058 --- Tara Dropped below overflow, parasite vent blurping weakly
17931 19 Jun 2021 @ 2119 --- User34 In startup sequence, right pool quiet
17909 19 Jun 2021 @ 1201 --- Craigmon99 ie at this time from previous eruption. Parasite vent is still on however it is weaker. Regular south pressure pool vent is bubbling which is noteworthy as is north pressure pool.
17908 19 Jun 2021 @ 1146 --- Tara in overflow, parasite vent back on strong
17907 19 Jun 2021 @ 0935 --- Tara 0935 water level rising, parasite vent off, south pool slightly murky. after rising to overflow, the south pool had increasingly vigorous boiling and no bubbles from the parasite vent. during this time Thumping Hole was splashing to 1-1.5', and its water level rose enough to create runoff. Penta water level also up with slightly silty water
17867 17 Jun 2021 @ 1242 --- Craigmon99 On strong. Parasite vent strong almost to 3 feet
17854 16 Jun 2021 @ 1555 --- Craigmon99 Parasite on
17852 16 Jun 2021 @ 1548 --- Craigmon99 Parasite vent off
17836 15 Jun 2021 @ 1629 --- Craigmon99 Parasite off. 1636 Parasite will attempt to turn on but spasmodic will attempt to begin eruption, turning parasite off.
17833 15 Jun 2021 @ 1613 --- Craigmon99 Has turned off since my break. Parasite still on. All behavior of surrounding vents is consistent with previous notes with spasmodic off.
17822 15 Jun 2021 @ 1327 --- Craigmon99 Parasite vent off as spasmodic attempts to start
17817 15 Jun 2021 @ 1313 --- Craigmon99 Off. Parasite vent ie.
17778 14 Jun 2021 @ 1607 --- Craigmon99 Off from ie
17682 11 Jun 2021 @ 0824 --- TheHikingDude In the duration of the 8:11 eruption, I walked up to see the two main pools bursting to a foot at most, however 5 vents in the front were going bezerk, shooting water around 2 to 3 feet in the air very rapidly.
17639 10 Jun 2021 @ 1339 --- Graham In overflow.
13884 05 Oct 2019 @ 0832 --- jkgood There is a glove bobbing about in one of the small vents near the boardwalk :-/
13365 23 Aug 2019 @ 1516 --- EmilyW Spasmodic seems drained and low at this time when old tardy is ie
12916 01 Aug 2019 @ 1310 --- rbwhitaker Only the big vent on the right (as seen from the trail) is erupting. Maybe a foot below overflow.
12865 29 Jul 2019 @ 1048 --- rbwhitaker Two feet below overflow. Fairly quiet. Only two to three feet splashing from the back of the right vent and one foot from the back vent. Otherwise quiet.
11987 27 Jun 2019 @ 1319 27 Jun 2019 @ 1447 ldgordon The near constant back vent in the right pool was paused with occainsial spalshes until 1344. It had strong eruptive episodes with frequent pauses for the rest of the eruption.
11961 25 Jun 2019 @ 1845 --- Craigmon99 Off and draining
11940 24 Jun 2019 @ 2009 --- ldgordon In overflow
11927 23 Jun 2019 @ 1425 --- Tara Dropped below overflow around this time.
11899 21 Jun 2019 @ 1344 --- Craigmon99 Off during Old Tardy, beginning to drain along with most of the sawmill complex except notably Churn
11809 15 Jun 2019 @ 1059 --- William all vents on vigorously
11602 06 Jun 2019 @ 1749 --- ldgordon Water level dropping.
11513 02 Jun 2019 @ 1757 --- ldgordon Water level dropping
11534 02 Jun 2019 @ 0951 --- Janet Jones Splash from the left vent! First one I’ve seen since the dormancy in the Sawmill Group. Video on my Instagram account - https://www.instagram.com/p/ByOyx4RAa93/
11129 29 Apr 2019 @ 1354 --- Polly Back vent quiet & front vents on. (Was the opposite on the 27th.)
10926 27 Jan 2019 @ 0900 --- Graham Active all week up and down.
10648 21 Oct 2018 @ 1312 --- rbwhitaker Both pools full and overflowing. Right vent is bursting maybe 3 feet, left pool is quiet. Back vent is off and on. All of the holes in front of the left pool are on.
10635 20 Oct 2018 @ 1339 --- Biddle One pool and one small vent in vigorous eruption, everything else somewhat quiet.
10214 15 Sep 2018 @ 1437 --- Micah Kipple Dropped below overflow with all vents nearly dying.
9794 20 Aug 2018 @ 1821 --- TheHikingDude Heavy steaming from Spasmodic Geyser area. Possible minor eruption? Area usually doesn’t steam like this.
9480 05 Aug 2018 @ 1635 05 Aug 2018 @ 1750 Micah Kipple Spasmodic is perpetually erupting from the back vent within the righthand pool. The back vent between the two pools is occasionally erupting up to 2 meters. I have seen no other vents while sitting here.
4035 03 May 2017 @ 1605 --- mhreed I count 21 vents actively erupting.
3770 09 Oct 2016 @ 1223 09 Oct 2016 @ 1356 WillBoekel started overflow then ended.
3102 20 Jun 2016 @ 1715 --- WillBoekel started overflowing
No attachments for this geyser.
Baseline does not exist.