Last Known Eruption
2h 31m ago
Predicted Next Eruption
Today at 1958 ± 45 minutes

Latest Eruptions

Eruption DurationInterval
21 Aug 2018 @ 0613 wc maj13h 45m
20 Aug 2018 @ 1628 ie wc maj13h 43m
20 Aug 2018 @ 0245 wc maj14h 23m
19 Aug 2018 @ 1222 wc maj9h 36m
19 Aug 2018 @ 0246 E min4h 21m
18 Aug 2018 @ 2225 wc min13h 5m
18 Aug 2018 @ 0920 E maj13h 30m
17 Aug 2018 @ 1950 ie maj13h 25m
17 Aug 2018 @ 0625 wc maj13h 18m
16 Aug 2018 @ 1707 wc maj13h 22m
16 Aug 2018 @ 0345 wc maj14h 37m
15 Aug 2018 @ 1308 maj5h 54m
15 Aug 2018 @ 0714 wc min<6m 13h 18m
14 Aug 2018 @ 1756 maj>22m 13h 45m
14 Aug 2018 @ 0411 wc maj19h 52m
13 Aug 2018 @ 0819 maj6h 2m
13 Aug 2018 @ 0217 wc min14h 13m
12 Aug 2018 @ 1204 wc maj5h 21m
12 Aug 2018 @ 0643 wc min13h 30m
11 Aug 2018 @ 1713 maj13h 20m
11 Aug 2018 @ 0353 wc maj13h 26m
10 Aug 2018 @ 1427 maj15h 21m
09 Aug 2018 @ 2306 wc maj1d 14h 4m
08 Aug 2018 @ 0902 min13h 27m
07 Aug 2018 @ 1935 maj13h 14m
07 Aug 2018 @ 0621 maj13h 19m
06 Aug 2018 @ 1702 maj13h 22m
06 Aug 2018 @ 0340 E maj13h 21m
05 Aug 2018 @ 1419 maj13h 25m
05 Aug 2018 @ 0054 wc maj13h 32m
04 Aug 2018 @ 1122 maj13h 34m
03 Aug 2018 @ 2148 ? wc maj13h 29m
03 Aug 2018 @ 0819 wc maj13h 54m
02 Aug 2018 @ 1825 wc maj11h 16m
02 Aug 2018 @ 0709 min4h 56m
02 Aug 2018 @ 0213 wc min13h 0m
01 Aug 2018 @ 1313 wc maj12h 48m
01 Aug 2018 @ 0025 wc maj14h 36m
31 Jul 2018 @ 0949 wc maj9h 6m
31 Jul 2018 @ 0043 wc min~4m 14h 14m
30 Jul 2018 @ 1029 ie maj3h 29m
30 Jul 2018 @ 0700 wc min13h 57m
29 Jul 2018 @ 1703 wc maj8h 16m
29 Jul 2018 @ 0847 wc min4m 13h 12m
28 Jul 2018 @ 1935 wc maj13h 31m
28 Jul 2018 @ 0604 wc maj13h 32m
27 Jul 2018 @ 1632 maj13h 44m
27 Jul 2018 @ 0248 wc maj13h 33m
26 Jul 2018 @ 1315 wc maj13h 46m
25 Jul 2018 @ 2329 wc maj14h 32m
25 Jul 2018 @ 0857 maj7h 59m
25 Jul 2018 @ 0058 wc min~5m 14h 41m
24 Jul 2018 @ 1017 ns maj5h 12m
24 Jul 2018 @ 0505 wc min~4m 13h 17m
23 Jul 2018 @ 1548 wc maj13h 35m
23 Jul 2018 @ 0213 wc maj14h 12m
22 Jul 2018 @ 1201 wc maj8h 9m
22 Jul 2018 @ 0352 wc min14h 5m
21 Jul 2018 @ 1347 wc maj13h 40m
21 Jul 2018 @ 0007 wc maj13h 58m
20 Jul 2018 @ 1009 wc maj13h 38m
19 Jul 2018 @ 2031 wc maj14h 8m
19 Jul 2018 @ 0623 wc maj4h 18m
19 Jul 2018 @ 0205 wc min12h 53m
18 Jul 2018 @ 1312 wc maj13h 50m
17 Jul 2018 @ 2322 wc maj13h 51m
17 Jul 2018 @ 0931 wc maj13h 49m
16 Jul 2018 @ 1942 wc maj14h 31m
16 Jul 2018 @ 0511 wc maj14h 7m
15 Jul 2018 @ 1504 wc maj14h 52m
15 Jul 2018 @ 0012 wc maj6h 59m
14 Jul 2018 @ 1713 min13h 42m
14 Jul 2018 @ 0331 wc maj13h 44m
13 Jul 2018 @ 1347 maj14h 19m
12 Jul 2018 @ 2328 ie wc maj13h 57m
12 Jul 2018 @ 0931 maj15h 18m
11 Jul 2018 @ 1813 wc maj9h 7m
11 Jul 2018 @ 0906 min13h 39m
10 Jul 2018 @ 1927 maj13h 53m
10 Jul 2018 @ 0534 wc maj15h 19m
09 Jul 2018 @ 1415 wc maj9h 23m
09 Jul 2018 @ 0452 wc min3m 4h 57m
08 Jul 2018 @ 2355 wc min13h 43m
08 Jul 2018 @ 1012 wc maj13h 40m
07 Jul 2018 @ 2032 maj14h 32m
07 Jul 2018 @ 0600 ie wc maj8h 16m
06 Jul 2018 @ 2144 wc min~6m 14h 42m
06 Jul 2018 @ 0702 wc maj7h 30m
05 Jul 2018 @ 2332 wc min8m 14h 58m
05 Jul 2018 @ 0834 maj8h 21m
05 Jul 2018 @ 0013 wc min15h 7m
04 Jul 2018 @ 0906 maj5h 40m
04 Jul 2018 @ 0326 wc min~4m 3h 44m
03 Jul 2018 @ 2342 wc min5m 14h 47m
03 Jul 2018 @ 0855 wc maj7h 11m
03 Jul 2018 @ 0144 wc min4m 30s 13h 36m
02 Jul 2018 @ 1208 ie maj13h 33m
01 Jul 2018 @ 2235 wc maj13h 51m
01 Jul 2018 @ 0844 maj13h 48m
30 Jun 2018 @ 1856 maj13h 53m

Interval Statistics

Interval Count100
Min3h 29m
Max1d 14h 4m
Mean12h 29m
Median13h 33m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
9268 22 Jul 2018 @ 0553 --- JimS Sloshing. Overnight eruption was a minor.
8413 02 Jun 2018 @ 1237 --- DaveM Duration was 4 minutes. Geysertimes chose a less complete entry submitted 7 minutes after the eruption over a webcam entry. I find the bias of the software disturbing. A more complete entry should be listed as primary whether is is submitted immediately or much later or if it is seen in person or on the webcam.
8235 19 May 2018 @ 0934 --- JimS Sloshing vigorously. Had a minor overnight.
8044 29 Apr 2018 @ 2134 --- Micah Kipple beginning to transition into steam
7963 31 Mar 2018 @ 2218 --- Pat Snyder Might have minored. IE at 2211, off by 2217. I didn't see the start, though.
7958 11 Mar 2018 @ 0429 --- MikeG Looks like an eruption at 04:29. It's also very cold and steamy out.
7878 27 Jan 2018 @ 1400 --- Graham Not in steam phase. must have had a minor. No eruption seen during my wait for Grand.
7701 10 Oct 2017 @ 1516 --- JSJ Castle off-camera, but patches of billowing steam consistent with an eruption first visible on web camera at 1516.
7532 29 Sep 2017 @ 0741 --- JimS Sloshing. Probably Had a minor eruption overnight.
7444 27 Sep 2017 @ 0903 --- JimS Sloshing. Had a second minor eruption overnight.
7258 25 Sep 2017 @ 0700 --- JimS Quiet. Had a major eruption overnight.
7027 23 Sep 2017 @ 0738 --- JimS Sloshing. Had a minor eruption overnight.
6749 18 Sep 2017 @ 0730 --- JimS Quiet. Had a major eruption overnight.
6628 17 Sep 2017 @ 0726 --- JimS Sloshing. Had a minor eruption overnight.
6364 14 Sep 2017 @ 0657 --- JimS Quiet. Had a major eruption overnight.
6271 11 Sep 2017 @ 0649 --- JimS Sloshing. Had a minor eruption overnight.
6263 10 Sep 2017 @ 1422 --- Betty Seems to be ie, but Castle is out of webcam view and only drifting steam is visible
5798 05 Sep 2017 @ 0631 --- JimS Quiet. Had a major eruption overnight.
5667 03 Sep 2017 @ 0804 --- JimS Sloshing. Had a minor eruption.
5568 02 Sep 2017 @ 0628 --- JimS Quiet. Had a major eruption overnight.
5398 26 Aug 2017 @ 0745 --- JimS Sloshing. Had a minor eruption.
5316 25 Aug 2017 @ 0625 --- JimS Quiet. Had a major eruption overnight.
5308 24 Aug 2017 @ 1446 --- LotusBaker castle is a major
5298 24 Aug 2017 @ 0600 --- JimS Quiet. Had a major eruption overnight.
5275 23 Aug 2017 @ 0610 23 Aug 2017 @ 0630 JimS Sloshing. Had a minor eruption early this morning.
5196 22 Aug 2017 @ 0616 --- JimS Quiet. Had a major eruption overnight.
4887 14 Aug 2017 @ 0640 --- JimS Quiet. Had a major eruption overnight.
4810 06 Aug 2017 @ 0553 --- JimS Quiet. Had a major eruption overnight.
4802 05 Aug 2017 @ 0600 --- JimS Quiet. Had a major eruption overnight.
4778 04 Aug 2017 @ 0616 --- EmilyW Sloshing, minored overnight
4779 04 Aug 2017 @ 0616 --- JimS Sloshing. Had a minor eruption overnight.
4753 03 Aug 2017 @ 0554 --- JimS Sloshing. overnight eruption was a minor.
4590 01 Aug 2017 @ 0711 --- JimS Apparently had a minor eruption early this morning.
4587 31 Jul 2017 @ 0831 --- EmilyW Sloshing, castle minored overnight
4532 25 Jul 2017 @ 0755 --- EmilyW Quiet, majored overnight
4520 24 Jul 2017 @ 0630 --- JimS Quiet. Had a major eruption overnight.
4507 20 Jul 2017 @ 0527 --- JimS Quiet. Had a major eruption overnight after the minor yesterday evening.
4475 17 Jul 2017 @ 0638 --- SteveO minor overninght
4471 16 Jul 2017 @ 0532 --- JimS Quiet. Had a major eruption overnight.
4465 15 Jul 2017 @ 0517 --- JimS Quiet. Had a major eruption sometime overnight.
4442 11 Jul 2017 @ 0632 --- JimS Quiet. Had a major eruption overnight.
4433 10 Jul 2017 @ 1441 --- udo Prediction from 724Victor = 1530 +/-45
4431 10 Jul 2017 @ 0630 --- JimS Quiet. Had a major eruption sometime overnight.
4407 05 Jul 2017 @ 0622 --- JimS Quiet. Had a major eruption sometime overnight.
4404 04 Jul 2017 @ 0550 --- JimS Sloshing. Had a minor eruption overnight.
4366 27 Jun 2017 @ 0524 --- JimS Quiet. Had a major eruption overnight.
4316 15 Jun 2017 @ 0625 --- B**2 Castle is in steam phase of eruption.
4187 03 Jun 2017 @ 0618 --- JimS Quiet. Had a major eruption sometime overnight.
4173 02 Jun 2017 @ 0655 02 Jun 2017 @ 0710 JimS Sloshing. Had a minor eruption sometime overnight.
4162 01 Jun 2017 @ 0612 --- JimS Quiet. Had a major eruption sometime overnight.
4155 31 May 2017 @ 0554 --- JimS Sloshing. Had a minor eruption sometime overnight.
4137 27 May 2017 @ 0620 --- SteveO Castle in very late steam phase, roaring and no water.
4116 23 May 2017 @ 0515 --- SteveO Major overnight, still a little forced steam.
4113 22 May 2017 @ 0630 --- JimS Appears to have had a minor eruption sometime overnight.
4097 16 May 2017 @ 0541 --- JimS Sloshing. No major eruption yet.
4094 14 May 2017 @ 0612 --- JimS Quiet. Had a major eruption sometime overnight.
4040 05 May 2017 @ 0545 --- JimS Quiet. Most recent eruption was a major
3924 24 Jan 2017 @ 2103 --- Casey Dark, but appears to be ie edit: still significant steam at 2207
3920 24 Jan 2017 @ 0629 --- Kitt B large steam cloud on cam, possibly ie, but too dark to see water
3904 29 Dec 2016 @ 1051 --- Kevin L Very foggy but it looked like Castle may have been ie. Fog downbasin may have been the result of a Castle eruption since it appeared that there was a steam phase plume at 1118 and the fog cleared shortly after that.
3780 13 Oct 2016 @ 1200 --- udo Castle has been jetting frequently 6 to 20 feet all afternoon as if it had a minor. It was quiet earlier in the morning. A bit odd.
3765 09 Oct 2016 @ 0759 --- Kitt B Castle had a major before 7am, boardwalk icy, path wet, and Castle quiet.
3733 01 Oct 2016 @ 0843 --- Kitt B Castle minored
3729 30 Sep 2016 @ 0756 --- Kitt B Castle was splashing around this morning, so it must have minor ed overnight
3730 30 Sep 2016 @ 0530 --- Kitt B Dan told me he heard Castle in steam phase. I saw some splashing from Castle, but then I left the basin to check on Great Fountain.
3689 19 Sep 2016 @ 2320 --- Casey Webcam observer mentioned short period of activity. If found to have had a minor eruption overnight, it was probably ie 2320.
3683 18 Sep 2016 @ 0645 --- JimS Quiet. Had a major eruption sometime overnight.
3665 15 Sep 2016 @ 0638 --- JimS Still sloshing from minor.
3657 14 Sep 2016 @ 0648 --- JimS Sloshing. Had a minor eruption sometime overnight.
3654 13 Sep 2016 @ 0642 --- JimS Quiet. Had a major eruption sometime overnight.
3649 12 Sep 2016 @ 0649 --- JimS Quiet. Had a major eruption sometime overnight.
3642 11 Sep 2016 @ 0636 --- JimS Sloshing. Had a minor eruption sometime overnight.
3606 06 Sep 2016 @ 0630 --- JimS Quiet. Had a major eruption sometime overnight.
3591 02 Sep 2016 @ 0612 --- JimS Quiet. Had a major eruption sometime overnight.
3583 01 Sep 2016 @ 0610 --- JimS Quiet. Had a major eruption sometime overnight.
3587 31 Aug 2016 @ 2337 --- DGInc Might've erupted. If so, then it was a major (see note by JimS @ 0610).
3573 30 Aug 2016 @ 0612 --- JimS Sloshing. Had a minor eruption sometime overnight.
3568 29 Aug 2016 @ 0607 --- JimS Quiet. Had a major eruption sometime overnight.
3570 29 Aug 2016 @ 0015 --- DGInc Might've erupted. If so, then it was a major (see note that was submitted @ 0607)
3559 28 Aug 2016 @ 0611 --- JimS Quiet. Had a major eruption sometime overnight.
3553 27 Aug 2016 @ 0607 --- JimS Quiet. Had a major eruption sometime overnight.
3543 26 Aug 2016 @ 0624 --- JimS Quiet. Had a major eruption sometime overnight.
3486 13 Aug 2016 @ 0544 --- JimS Sloshing. Had a minor eruption sometime overnight.
3444 08 Aug 2016 @ 0547 --- JimS Quiet. Had a major eruption overnight. Might have been the eruption reported late last evening.
3431 06 Aug 2016 @ 0534 --- JimS Sloshing. Had a minor eruption sometime overnight.
3382 28 Jul 2016 @ 0534 --- JimS Sloshing. Had a minor eruption overnight.
3335 21 Jul 2016 @ 0557 --- JimS Quiet. Had a major eruption sometime overnight.
3299 13 Jul 2016 @ 0504 --- JimS In steam. A major.
3233 07 Jul 2016 @ 0506 --- JimS Quiet. Had a major eruption sometime overnight.
3235 07 Jul 2016 @ 0149 --- DGInc Was ie, probably a couple of minutes after the start
3221 06 Jul 2016 @ 0601 --- JimS Quiet. Had a major eruption sometime overnight.
3162 01 Jul 2016 @ 0513 --- JimS Quiet. Had a major eruption sometime overnight.
3086 18 Jun 2016 @ 0515 --- JimS Still no major.
3076 16 Jun 2016 @ 0512 --- JimS Quiet. Had a major eruption sometime overnight.
3063 14 Jun 2016 @ 0505 --- JimS Quiet. Had major eruption sometime overnight.
3056 12 Jun 2016 @ 0505 12 Jun 2016 @ 0534 JimS Sloshing. Had a minor eruption early this morning.
3044 11 Jun 2016 @ 0504 --- JimS Quiet. Had a major eruption sometime overnight.
2999 07 Jun 2016 @ 0453 --- JimS Still sloshing. No major yet.
2988 06 Jun 2016 @ 0509 --- JimS Quiet. Had a major eruption sometime overnight.
2955 03 Jun 2016 @ 0509 --- JimS Quiet. Had a major eruption sometime overnight.
EntrySourceLinkComment
28 Jan 2017 @ 1039 JSJ https://www.youtube.com/watch?v=eSORnt-mHN0 Video of Castle Geyser erupting (water phase) on 28 January 2017.
11 Aug 2016 @ 1358 JSJ https://www.flickr.com/photos/jsjgeology/30476239182 Thermal image (1 of 4) of Castle Geyser's 1:58 PM-onward eruption on 11 August 2016.
11 Aug 2016 @ 1358 JSJ https://www.flickr.com/photos/jsjgeology/29959320393 Photo (1 of 7) of Castle Geyser's 1:58 PM-onward eruption on 11 August 2016.
03 Jun 2016 @ 1748 JSJ https://www.flickr.com/photos/jsjgeology/29096074105 Photo (1 of 3) of Castle Geyser's 5:48 PM-onward eruption on 3 June 2016.
03 Jul 2013 @ 0711 JSJ https://www.youtube.com/watch?v=dlT_ulj6fmI Video by Micah Kipple of the 3 July 2013 morning major eruption (steam phase) of Castle Geyser.
03 Jul 2013 @ 0711 JSJ https://www.youtube.com/watch?v=UVClJ3jb52M Video by Micah Kipple of the 3 July 2013 morning major eruption (water phase) of Castle Geyser.
15 Aug 2015 @ 0957 JSJ https://www.youtube.com/watch?v=fP59M_A8la8#t=6m57s See clips # 18-31 (time stamp - 6:57) of this video compilation.
14 Aug 2015 @ 1530 JSJ https://www.youtube.com/watch?v=fP59M_A8la8#t=4m09s See clips # 11-17 (time stamps - 4:09 to 6:57) of this video compilation.
09 Aug 2015 @ 1544 JSJ https://www.youtube.com/watch?v=fP59M_A8la8 See clips # 6-10 of this video compilation.
16 Aug 2014 @ 1234 JSJ https://www.youtube.com/watch?v=fP59M_A8la8 See clips # 3-5 of this video compilation.
06 Jul 2015 @ 1256 JSJ https://www.youtube.com/watch?v=fP59M_A8la8 See clips # 1-2 of this video compilation.
28 Sep 2015 @ 0542 td http://i61.tinypic.com/2hdwbqf.jpg Castle 5:47
08 Sep 2014 @ 1201 Micah Kipple https://www.flickr.com/photos/sgplewka/15582865600 flickr
24 Sep 2014 @ 1338 Micah Kipple https://www.flickr.com/photos/126760153@N03/15642309900 flickr
17 Oct 2014 @ 1224 Micah Kipple https://www.flickr.com/photos/57621754@N08/15785065928 flickr
28 Sep 2014 @ 1458 Micah Kipple https://www.flickr.com/photos/castle_bravo/15661819608 flickr
26 Sep 2012 @ 1234 Micah Kipple https://www.flickr.com/photos/npsaficionado/15830592629 flickr
29 Aug 2011 @ 1444 Micah Kipple https://www.flickr.com/photos/128570456@N08/15922246028 flickr
16 Sep 2007 @ 1841 Micah Kipple https://www.flickr.com/photos/130216833@N06/16100193606 flickr
21 Sep 2012 @ 1842 Micah Kipple https://www.flickr.com/photos/129292470@N04/16127639365 flickr
BaselineDistance (ft)Description
Bike Path 200On the side of the bike path south of the geyser.


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