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
Old Faithful and Geyser Hill


  • Fan and Mortar Geyser erupted in the evening (at 1859) on 7 Oct 2015 – the last eruption was on 28 Aug 2015 at 0932. (updated 7 Oct 2015)
  • Echinus Geyser in Norris Geyser Basin has had some eruptions according to electronic monitors (if you witness an eruption, take photos and notify rangers).
  • 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) .
  • Ledge Geyser in Norris Geyser Basin has not been seen since 12 Sept 2015 – about the time Norris Geyser Basin had a disturbance. Perhaps this active cycle is over. (updated 28 Sept 2015)

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


  • "Improbable Geyser" had a rare eruption today. Empty crater now. #GeyserWatch

Follow Us

NOAA Weather

Yellowstone Lake, WY

Last Updated on Oct 10 2015, 5:56 am MDT

Current Conditions:


Temp: 32°F

Wind: North at 0mph

Humidity: 92%

Dewpoint: 30.0°F

Your 5-Day Forecast at a Glance

Print Friendly