Welcome to Geyser Watch

An Online Field Journal - part of YellowstoneNaturalist.com

Watching water go the other way…

as well as many more not-quite-so-exciting thermal features of Yellowstone.

Take a virtual walk

on the boardwalks around Old Faithful Geyser and Geyser Hill.

Start the Tour


  • Fan and Mortar Geyser had its last known eruption on 22 APR 2016 at 2031 (9:31 PM). That makes for an interval of 6 days, 4 hours, 57 minutes.
  • Ledge Geyser in Norris Geyser Basin was caught in eruption on 27 Dec 2015 by Yellowstone Tour Guides. Go, Ledge!
  • Pot o’ Gold on Geyser Hill had a small eruption on 11 Oct 2015 about a foot high for a few seconds. This one hasn’t been reported in eruption in years.
  • Giant Geyser has erupted early in the morning on 28 Sept 2015. Learn how to watch for a Giant Geyser Eruption.
  • “Improbable” Geyser on Geyser Hill had a major eruption again on 18 August 2015 (if you witness an eruption, take photos and notify rangers) .

If you do witness a rare eruption, I’d also like to hear from you.

News from Yellowstone Naturalist:

An excellent video by Yellowstone National Park Service


  • ...and across the bridge, hopped off and headed over to meet the other two coyotes. #Yellowstone

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NOAA Weather

Yellowstone Lake, WY

Last Updated on Apr 27 2016, 4:56 pm MDT

Current Conditions:


Temp: 36°F

Wind: North at 0mph

Humidity: 62%

Dewpoint: 24.1°F

Your 5-Day Forecast at a Glance

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