Hillside Geyser is located in the West Thumb Geyser Basin of Yellowstone. Hillside is about halfway between Twin Geyser and Black pool. Hillside has an interval of between 10 hours and 51 hours in 2001. The mean interval is about 22 hours and 21 minutes.

Hillside Geyser September 2001:

Hillside movie (1.9 Mb, 30 sec, sound)

Image copyright 2001, George and Sue Schroeder. All rights reserved.