Last Known Eruption
12h 8m ago
Predicted Next Eruption
Today at 0534 ± 45 minutes

Latest Eruptions

Eruption DurationInterval
26 Jun 2019 @ 1449 maj6h 0m
26 Jun 2019 @ 0849 min13h 9m
25 Jun 2019 @ 1940 ns wc maj13h 32m
25 Jun 2019 @ 0608 maj13h 55m
24 Jun 2019 @ 1613 maj14h 43m
24 Jun 2019 @ 0130 wc maj7h 45m
23 Jun 2019 @ 1745 min13h 15m
23 Jun 2019 @ 0430 wc maj13h 27m
22 Jun 2019 @ 1503 maj13h 40m
22 Jun 2019 @ 0123 wc maj13h 38m
21 Jun 2019 @ 114513h 27m
20 Jun 2019 @ 2218 ie wc maj13h 50m
20 Jun 2019 @ 0828 ns maj13h 23m
19 Jun 2019 @ 1905 maj13h 30m
19 Jun 2019 @ 0535 wc maj13h 40m
18 Jun 2019 @ 1555 maj13h 14m
18 Jun 2019 @ 0241 wc maj13h 42m
17 Jun 2019 @ 1259 maj13h 45m
16 Jun 2019 @ 231413h 45m
16 Jun 2019 @ 0929 maj19m 13h 26m
15 Jun 2019 @ 2003 maj13h 53m
15 Jun 2019 @ 0610 wc maj14h 46m
14 Jun 2019 @ 1524 ns maj7h 19m
14 Jun 2019 @ 0805 wc min5m < d < 7m13h 25m
13 Jun 2019 @ 1840 ie wc maj13h 34m
13 Jun 2019 @ 0506 E maj14h 29m
12 Jun 2019 @ 1437 wc maj9h 54m
12 Jun 2019 @ 0443 wc min13h 44m
11 Jun 2019 @ 1459 maj13h 56m
11 Jun 2019 @ 0103 wc maj14h 43m
10 Jun 2019 @ 1020 ie maj5h 37m
10 Jun 2019 @ 0443 E min14h 33m
09 Jun 2019 @ 1410 maj11h 19m
09 Jun 2019 @ 0251 E maj13h 50m
08 Jun 2019 @ 1301 maj14h 42m
07 Jun 2019 @ 2219 E maj4h 8m
07 Jun 2019 @ 1811 E min13h 56m
07 Jun 2019 @ 0415 E maj5h 20m
06 Jun 2019 @ 2255 E min13h 32m
06 Jun 2019 @ 0923 maj14h 7m
05 Jun 2019 @ 1916 maj13h 52m
05 Jun 2019 @ 0524 wc maj13h 58m
04 Jun 2019 @ 1526 maj14h 14m
04 Jun 2019 @ 0112 E maj4h 36m
03 Jun 2019 @ 203613h 25m
03 Jun 2019 @ 0711 maj13h 37m
02 Jun 2019 @ 1734 maj14h 38m
02 Jun 2019 @ 0256 wc maj4h 52m
01 Jun 2019 @ 2204 min13h 7m
01 Jun 2019 @ 0857 ie wc maj14h 45m
31 May 2019 @ 1812 wc maj4h 8m
31 May 2019 @ 1404 min3.5m 13h 35m
31 May 2019 @ 0029 wc maj13h 44m
30 May 2019 @ 1045 maj13h 55m
29 May 2019 @ 2050 maj13h 44m
29 May 2019 @ 0706 maj13h 51m
28 May 2019 @ 1715 maj13h 54m
28 May 2019 @ 0321 E maj13h 56m
27 May 2019 @ 1325 wc maj13h 53m
26 May 2019 @ 2332 wc maj15h 28m
26 May 2019 @ 0804 maj6h 32m
26 May 2019 @ 0132 wc min~5m 13h 30m
25 May 2019 @ 1202 maj13h 59m
24 May 2019 @ 2203 ? wc min13h 52m
24 May 2019 @ 081113h 55m
23 May 2019 @ 1816 maj15h 48m
23 May 2019 @ 0228 E maj10h 33m
22 May 2019 @ 1555 E min7h 47m
22 May 2019 @ 0808 ns wc min15h 37m
21 May 2019 @ 1631 ie wc maj10h 54m
21 May 2019 @ 0537 E min6h 48m
20 May 2019 @ 2249 E min14h 55m
20 May 2019 @ 0754 wc maj10h 32m
19 May 2019 @ 2122 min4h 29m
19 May 2019 @ 1653 min4m 13h 8m
19 May 2019 @ 0345 ie wc maj14h 12m
18 May 2019 @ 1333 maj13h 53m
17 May 2019 @ 2340 wc maj13h 44m
17 May 2019 @ 0956 wc maj13h 41m
16 May 2019 @ 2015 maj15h 2m
16 May 2019 @ 0513 ie wc maj16h 34m
15 May 2019 @ 1239 wc min13h 27m
14 May 2019 @ 2312 maj14h 4m
14 May 2019 @ 0908 maj14h 14m
13 May 2019 @ 1854 ie wc maj14h 2m
13 May 2019 @ 0452 ie wc maj5h 37m
12 May 2019 @ 2315 wc min~4m 14h 13m
12 May 2019 @ 0902 ie wc maj21m
12 May 2019 @ 0841 E maj3h 44m
12 May 2019 @ 0457 ns wc min13h 35m
11 May 2019 @ 1522 ie maj23m
11 May 2019 @ 1459 E maj7h 21m
11 May 2019 @ 0738 wc min13h 34m
10 May 2019 @ 1804 maj13h 45m
10 May 2019 @ 0419 wc maj13h 37m
09 May 2019 @ 1442 ie wc maj26m
09 May 2019 @ 1416 E maj14h 42m
08 May 2019 @ 2334 wc maj6h 1m
08 May 2019 @ 1733 ie wc14h 46m
08 May 2019 @ 0247 E maj8h 25m

Interval Statistics

Interval Count100
Min21m
Max16h 34m
Mean11h 57m
Median13h 40m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
11612 07 Jun 2019 @ 0848 --- B**2 Very quiet. Probably an overnight major. Was quiet when I passed by about 07:00 too.
11438 31 May 2019 @ 0713 --- B**2 Castle quiet - probable overnight major.
11283 21 May 2019 @ 1130 --- AngelaT Observed erratic, ongoing eruptions up to 2 m high past 1 hour.
11373 21 May 2019 @ 1045 --- Ben VL Sloppy. Minored overnight.
11127 29 Apr 2019 @ 1023 --- Polly Appears to have had a major this morning.
11093 27 Apr 2019 @ 0751 --- Micah Kipple Splashy play. May have minored overnight
11045 22 Apr 2019 @ 1057 --- mhvogel A volunteer observed castle having a major. He saw it transition from water to heavy steam phase.
10953 03 Mar 2019 @ 0845 03 Mar 2019 @ 1045 AngelaT A lot of splashing activity observed. Did it have a minor this morning?
10759 02 Dec 2018 @ 0341 --- JSJ GOSA playback shows a Castle eruption at 0341 with a more slender steam column than the 2204 eruption. Steam column present to about 0430 at least, when visibility was lost.
10696 01 Nov 2018 @ 1115 --- mhvogel According to the electronic download castle had a minor @ 0326. I didn't see any other eruptions from castle on the download after that time.
10322 21 Sep 2018 @ 1317 --- Minafuku Castle doing lots of high splashes for being only halfway through its cycle. Apparently has been for awhile already.
10264 16 Sep 2018 @ 1804 --- STS New NPS prediction of 0515 on September 17
9866 25 Aug 2018 @ 0758 --- Minafuku Quiet. Major overnight.
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.
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
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.
4097 16 May 2017 @ 0541 --- JimS Sloshing. No major eruption yet.
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
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.
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 --- JarnoO 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 --- JarnoO 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.
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.
EntrySourceLinkComment
10 Aug 2018 @ 1427 JSJ https://www.flickr.com/photos/jsjgeology/46465868542 Photo (1 of 3) of Castle Geyser's 2:27 PM-onward eruption on 10 August 2018, as seen from boardwalk near Liberty Pool.
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
BaselineDistance (ft)Description
Bike Path 200On the side of the bike path south of the geyser.


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