Last Known Eruption
7h 32m ago

Latest Eruptions

Eruption DurationInterval
14 Jun 2025 @ 1627 wc6h 22m
14 Jun 2025 @ 1005 ie7h 4m
14 Jun 2025 @ 0301 wc6h 42m
13 Jun 2025 @ 2019 wc18h 13m
13 Jun 2025 @ 0206 wc6h 35m
12 Jun 2025 @ 19315h 57m
12 Jun 2025 @ 1334 wc12h 43m
12 Jun 2025 @ 0051 wc6h 10m
11 Jun 2025 @ 1841 ie wc6h 21m
11 Jun 2025 @ 1220 wc5h 55m
11 Jun 2025 @ 0625 ie wc6h 43m
10 Jun 2025 @ 2342 wc13h 18m
10 Jun 2025 @ 1024 wc6h 35m
10 Jun 2025 @ 0349 wc6h 29m
09 Jun 2025 @ 2120 wc12h 20m
09 Jun 2025 @ 0900 ie wc6h 37m
09 Jun 2025 @ 0223 wc6h 42m
08 Jun 2025 @ 1941 ie wc6h 43m
08 Jun 2025 @ 12586h 32m
08 Jun 2025 @ 0626 wc6h 1m
08 Jun 2025 @ 0025 wc6h 36m
07 Jun 2025 @ 1749 wc13h 12m
07 Jun 2025 @ 0437 wc6h 28m
06 Jun 2025 @ 2209 wc6h 29m
06 Jun 2025 @ 1540 ie wc6h 40m
06 Jun 2025 @ 0900 wc6h 31m
06 Jun 2025 @ 0229 wc6h 37m
05 Jun 2025 @ 1952 wc12h 58m
05 Jun 2025 @ 0654 wc6h 35m
05 Jun 2025 @ 0019 wc6h 39m
04 Jun 2025 @ 1740 wc12h 46m
04 Jun 2025 @ 0454 ie wc6h 45m
03 Jun 2025 @ 2209 wc6h 0m
03 Jun 2025 @ 1609 ie wc6h 35m
03 Jun 2025 @ 0934 wc12h 58m
02 Jun 2025 @ 2036 ns wc6h 1m
02 Jun 2025 @ 1435 wc6h 25m
02 Jun 2025 @ 0810 ie wc1d 2h 6m
01 Jun 2025 @ 0604 ie wc12h 38m
31 May 2025 @ 17266h 29m
31 May 2025 @ 10576h 20m
31 May 2025 @ 0437 wc5h 26m
30 May 2025 @ 2311 wc6h 5m
30 May 2025 @ 17066h 7m
30 May 2025 @ 10596h 18m
30 May 2025 @ 0441 wc19h 25m
29 May 2025 @ 09165h 26m
29 May 2025 @ 0350 A5h 30m
28 May 2025 @ 2220 wc6h 23m
28 May 2025 @ 1557 wc5h 56m
28 May 2025 @ 100113h 2m
27 May 2025 @ 2059 wc6h 37m
27 May 2025 @ 14226h 38m
27 May 2025 @ 074412h 17m
26 May 2025 @ 1927 ns wc6h 23m
26 May 2025 @ 1304 ie5h 58m
26 May 2025 @ 070612h 3m
25 May 2025 @ 19036h 30m
25 May 2025 @ 12335h 55m
25 May 2025 @ 0638 wc12h 50m
24 May 2025 @ 1748 wc6h 33m
24 May 2025 @ 11156h 33m
24 May 2025 @ 0442 wc6h 31m
23 May 2025 @ 2211 wc6h 28m
23 May 2025 @ 1543 wc6h 41m
23 May 2025 @ 0902 wc12h 43m
22 May 2025 @ 2019 wc5h 59m
22 May 2025 @ 1420 wc6h 33m
22 May 2025 @ 0747 wc12h 29m
21 May 2025 @ 191819m 6h 3m
21 May 2025 @ 13156h 35m
21 May 2025 @ 0640 wc13h 8m
20 May 2025 @ 1732 wc6h 39m
20 May 2025 @ 10536h 30m
20 May 2025 @ 0423 wc11h 59m
19 May 2025 @ 1624 wc6h 3m
19 May 2025 @ 1021 wc19h 35m
18 May 2025 @ 1446 wc6h 32m
18 May 2025 @ 0814 ie13h 4m
17 May 2025 @ 191020m 6h 23m
17 May 2025 @ 1247 ie6h 25m
17 May 2025 @ 0622 wc12h 44m
16 May 2025 @ 1738 wc6h 32m
16 May 2025 @ 110619h 18m
15 May 2025 @ 1548 wc6h 37m
15 May 2025 @ 09116h 21m
15 May 2025 @ 0250 A6h 27m
14 May 2025 @ 2023 ie wc6h 17m
14 May 2025 @ 1406 wc6h 32m
14 May 2025 @ 0734 wc6h 29m
14 May 2025 @ 0105 wc6h 11m
13 May 2025 @ 1854 wc6h 32m
13 May 2025 @ 1222 ns6h 25m
13 May 2025 @ 0557 wc6h 1m
12 May 2025 @ 2356 wc6h 31m
12 May 2025 @ 1725 wc6h 25m
12 May 2025 @ 1100 A5h 16m
12 May 2025 @ 0544 ie wc12h 54m
11 May 2025 @ 1650 A6h 4m
11 May 2025 @ 1046 ie wc5h 31m

Interval Statistics

Interval Count100
Min5h 16m
Max1d 2h 6m
Mean8h 16m
Median6h 32m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
39543 31 May 2025 @ 0910 --- CraigC in overflow
39520 30 May 2025 @ 0932 --- CraigC in overflow
39518 30 May 2025 @ 0856 --- CraigC no overflow yet
39459 29 May 2025 @ 0858 --- CraigC in overflow
39425 28 May 2025 @ 0801 --- CraigC in overflow
39420 28 May 2025 @ 0750 --- CraigC no overflow yet
39404 27 May 2025 @ 1300 --- CraigC in overflow
39388 27 May 2025 @ 0635 --- CraigC in overflow
39272 23 May 2025 @ 0744 --- SteveO In overflow.
38879 08 May 2025 @ 0926 --- ghost842 In overflow
38649 27 Apr 2025 @ 0640 --- ghost842 Overflow started around 0640
38635 26 Apr 2025 @ 1122 --- DanS Not in overflow yet
38238 05 Feb 2025 @ 1549 --- Pholli in overflow:]
38031 18 Dec 2024 @ 1252 --- K.Cooper already in overflow
37985 11 Dec 2024 @ 1034 --- mwolf In overflow
37694 23 Oct 2024 @ 1649 --- DaveM Riverside eruption was 1649wc. The 1622 event did not produce enough steam to be seen on the webcam. the 1649 steam cloud was quite large.
37461 09 Oct 2024 @ 1304 --- mrsteed overflow resumed
37455 09 Oct 2024 @ 1115 --- mrsteed In overflow. Overflow began around 11:10AM
37276 30 Sep 2024 @ 0856 --- ddshepard In overflow
37275 30 Sep 2024 @ 0815 --- ddshepard No overflow; Bison to left of geyser.
37229 28 Sep 2024 @ 1908 --- User34 Series of heavy splashing and jetting from left vent that lasted a little over a minute. Overflow ceased early on during this activity and then resumed at 1921 (p=13m)
37203 28 Sep 2024 @ 0948 --- Pholli still no overflow
37201 28 Sep 2024 @ 0829 --- ddshepard Not in overflow
37163 26 Sep 2024 @ 0845 --- Borg In moderate overflow
37161 26 Sep 2024 @ 0733 --- Borg Dry, no overflow
37152 25 Sep 2024 @ 1319 --- Negh Started boiling over
37134 24 Sep 2024 @ 1129 --- Borg Overflow began at 1129
36939 12 Sep 2024 @ 1630 12 Sep 2024 @ 1648 Borg In light overflow, began within last 15 min
36897 11 Sep 2024 @ 0839 --- Lizzysa In overflow
36814 06 Sep 2024 @ 1530 06 Sep 2024 @ 1600 Borg Overflow began at 345
36765 05 Sep 2024 @ 0905 --- CraigC started overflow within last 12 mins
36737 04 Sep 2024 @ 0817 --- CraigC started overflow
36724 03 Sep 2024 @ 1617 --- Borg Post-eruptive
36715 03 Sep 2024 @ 0923 --- CraigC in overflow already
36667 01 Sep 2024 @ 1234 --- SantaFe108 In overflow.
36655 31 Aug 2024 @ 0717 --- CraigC started overflow again after false start
36653 31 Aug 2024 @ 0700 --- CraigC false start, huge splashing from keyhole for 2 mins, then shut off
36651 31 Aug 2024 @ 0643 --- CraigC already in overflow
36623 30 Aug 2024 @ 1041 --- ge start of overflow
36609 29 Aug 2024 @ 0905 --- CraigC already in overflow
36607 29 Aug 2024 @ 0756 --- CraigC no overflow yet
36595 28 Aug 2024 @ 0631 --- CraigC already in overflow, very light
36564 27 Aug 2024 @ 0639 --- CraigC already in overflow
36551 26 Aug 2024 @ 0645 --- CraigC heavy steam plume, no overflow, probably post-eruptive
36524 24 Aug 2024 @ 0702 --- BrianR Already in overflow
36434 17 Aug 2024 @ 0947 --- RMichaels In overflow as I passed by.
36373 11 Aug 2024 @ 1327 --- mwolf in overflow
36363 11 Aug 2024 @ 0743 --- CraigC in overflow
36343 10 Aug 2024 @ 0646 --- CraigC in overflow
36342 10 Aug 2024 @ 0620 --- CraigC no overflow
36323 08 Aug 2024 @ 0944 --- CraigC in overflow
36322 08 Aug 2024 @ 0843 --- CraigC no overflow
36312 07 Aug 2024 @ 0752 --- CraigC in overflow
36311 07 Aug 2024 @ 0730 --- CraigC no overflow
36297 06 Aug 2024 @ 0617 --- CraigC started overflow within last 15 minutes
36289 05 Aug 2024 @ 1040 --- CraigC in overflow
36288 05 Aug 2024 @ 1024 --- CraigC no overflow yet
36242 03 Aug 2024 @ 0742 --- CraigC in overflow
36233 02 Aug 2024 @ 2015 --- bhoppe first boiling water visible in MV at 2008. crater is gradually filling with water again. overflow began again at 2015
36232 02 Aug 2024 @ 2002 --- bhoppe Riverside's "Old Main Vent" put out quite a bit of water nonstop for about 75 seconds and totally killed any overflow from the real Main Vent. Almost like it would during a real eruption of Riverside just without the actual eruption of Riverside. Will upload video within a couple days
36100 25 Jul 2024 @ 1054 --- EmilyW In overflow
36091 25 Jul 2024 @ 0643 --- PamM Not in overflow
36069 24 Jul 2024 @ 0931 --- Polly Already in overflow
36038 22 Jul 2024 @ 1923 --- sierrarx overflow stopped for ~30 seconds
36037 22 Jul 2024 @ 1909 22 Jul 2024 @ 1911 sierrarx splashes out of "back" of chair followed by a surge out of main vent. Overflow completely stopped for 2 minutes before restarting
35853 11 Jul 2024 @ 1433 --- Delta4Heavy85 Start of Overflow 1433, 1st Boils 1445
35697 03 Jul 2024 @ 0820 --- CraigC in light overflow
35672 02 Jul 2024 @ 0709 --- CraigC started overflow within 5 mins
35629 30 Jun 2024 @ 0637 --- CraigC in overflow
35616 29 Jun 2024 @ 1022 --- Dave from B Overflow started in the last 10 minutes
35585 27 Jun 2024 @ 0703 --- CraigC in overflow
35566 26 Jun 2024 @ 0608 --- CraigC in light overflow
35508 24 Jun 2024 @ 0834 --- CraigC in overflow
35443 22 Jun 2024 @ 1250 --- CraigC in overflow
35305 18 Jun 2024 @ 1240 --- aferrara Boiling, overflowing, weak and intermittent keyhole
35255 16 Jun 2024 @ 1547 --- Forestbewithyou In overflow and doing some small splashing at times but variable.
35161 13 Jun 2024 @ 0704 --- JimS Already in overflow at this time
35138 12 Jun 2024 @ 0721 --- Art Already in overflow
34988 08 Jun 2024 @ 1137 --- RMichaels Entered overflow at 1137.
34862 03 Jun 2024 @ 1223 --- Graham In overflow
34788 31 May 2024 @ 1609 --- Stephen_Gemar Post eruptive. Just steaming; no overflow or boiling.
34678 26 May 2024 @ 0637 --- CraigC in overflow
34650 24 May 2024 @ 0639 --- CraigC in good overflow
34565 15 May 2024 @ 1138 --- ghost842 In strong overflow
34499 10 May 2024 @ 1103 --- jkgood In overflow
34468 06 May 2024 @ 1724 --- Paul Wheeler Awesome
34309 22 Apr 2024 @ 1009 --- DanS In overflow
34196 15 Apr 2024 @ 1337 --- mhreed Overflow occurred within the last 15 minutes
34195 15 Apr 2024 @ 0855 --- mhreed In overflow, decent splashing in the pool
33891 20 Jan 2024 @ 0726 --- K.Cooper quiet
33788 14 Jan 2024 @ 1528 --- K.Cooper started overflow very recently
33786 14 Jan 2024 @ 1457 --- K.Cooper dry.
33025 18 Dec 2023 @ 1123 --- mhreed Empty. Erupted sometime before 1050.
33019 18 Dec 2023 @ 0918 --- mhvogel In overflow as I walked up.
32937 16 Dec 2023 @ 1015 --- aferrara Overflow, keyhole on
32847 15 Dec 2023 @ 0955 --- Pholli in overflow
29166 26 Oct 2023 @ 0942 --- nomadruss In overflow, not vigorous. I’d guess it will erupt around 10:30 so be watching for it.
29063 23 Oct 2023 @ 0951 23 Oct 2023 @ 0952 mhvogel Post eruptive. Heavy steam from both vents with no water.
28940 21 Oct 2023 @ 0750 --- User34 In overflow
28708 08 Oct 2023 @ 1523 --- Darcie In overflow
EntrySourceLinkComment
31 May 2025 @ 0437 Joe   https://youtu.be/FNVoOTTZTeI video
22 Jul 2020 @ 1328 JSJ https://www.youtube.com/watch?v=DD6WNhycERw 4 minute video of eruption.
17 Jul 2020 @ 0826 JSJ https://www.youtube.com/watch?v=4nQk8faybk8 Video of Riverside Geyser's morning eruption on 17 July 2020.
24 Oct 2019 @ 0825 JoeN https://youtu.be/9zd4Sn1BbIE r-side video
24 Oct 2019 @ 0825 JoeN https://i.imgur.com/yAycpXd.png picture
17 Sep 2019 @ 0807 JoeN https://i.imgur.com/qav7bhe.png one shot pic
06 Jun 2018 @ 1346 JSJ https://www.flickr.com/photos/jsjgeology/28208979037 Photo (out of 3) of Riverside Geyser's afternoon eruption on 6 June 2018.
08 Aug 2017 @ 1845 JSJ https://www.flickr.com/photos/jsjgeology/35725848423 Photo (out of 6) of Riverside Geyser's 6:45 PM-onward eruption on 8 August 2017.
02 Jul 2016 @ 1244 JSJ https://www.youtube.com/watch?v=QiSiw1FbPF0 Video compilation of Riverside Geyser's 12:44 PM-onward eruption on 2 July 2016.
03 Jul 2016 @ 1540 JSJ https://www.flickr.com/photos/jsjgeology/28303442506 Photo (1 of 6) of Riverside Geyser's 3:40 PM-onward eruption on 3 July 2016.
02 Jul 2016 @ 1244 JSJ https://www.flickr.com/photos/jsjgeology/27721214383 Photo (1 of 2) of Riverside Geyser's 12:44 PM-onward eruption on 2 July 2016.
08 Jul 2014 @ 1600 JSJ https://www.flickr.com/photos/jsjgeology/15129110278 Photo (1 of 3) of Riverside Geyser erupting at 4:00 PM-onward on 8 July 2014.
04 Aug 2013 @ 1653 JSJ https://www.flickr.com/photos/jsjgeology/13923848943 Photo (first of many) of Riverside Geyser's 4:54 to 5:16 PM eruption on 4 August 2013.
31 May 2013 @ 1528 JSJ https://www.flickr.com/photos/jsjgeology/13923982114 Photo (first of many, plus videos) of Riverside Geyser's 3:28 to 3:49 PM eruption on 31 May 2013.
28 Sep 2015 @ 0428 td http://i57.tinypic.com/1426f41.jpg Riverside?
27 Apr 2015 @ 0709 td http://tinypic.com/m/inx2eh/3 Taken 4/27/15 at 07:14 MT
01 Jul 2009 @ 1145 Micah Kipple https://www.flickr.com/photos/fback2008/16380373861 Flickr
Baseline does not exist.