Mammoth in Yellowstone National Park in Park County, Wyoming — The American West (Mountains)
Grand Geyser
World’s Tallest Predictable Geyser
Photographed By Bill Coughlin, July 31, 2015
1. Grand Geyser Marker
Known for the height and beauty of its eruptions, Grand Geyser’s activity is linked with that of nearby geysers. An intricate sequence of events that takes place over 7 to 15 hours culminates in explosions of boiling water and steam from Grand’s pool. A full eruption can last from 9 to 12 minutes and reach heights of 180 feet or more.
Fast Facts:
• Grand Geyser is a fountain-type geyser.
• Grand’s eruptions occur in one or more bursts from its crater or pool. There is a short wait between bursts.
• Turban Geyser erupts every 15 to 22 minutes. Grand erupts at the onset of one of Turban’s eruptions.
The Grand “Group”
Turban Geyser erupts more frequently than the other two. Grand will erupt just before or after Turban erupts. The water level in Grand fluctuates with each Turban eruption, usually dropping noticeably. As an eruption of Grand Geyser nears, boiling water surges over the rim of its pool. Within seconds, Grand will erupt. Finally, Vent Geyser comes to life, jetting water to heights of 75 feet. Though Grand’s eruptions last only about 10 minutes, Vent and Turban can continue
this page online
Erected by National Park Service.
Topics. This historical marker is listed in this topic list: Natural Features.
Location. 44° 27.99′ N, 110° 50.243′ W. Marker is in Yellowstone National Park, Wyoming, in Park County. It is in Mammoth. Marker can be reached from Lower Grand Loop Road (U.S. 287), on the right when traveling north. Marker is located in the Upper Geyser Basin in Yellowstone National Park. Touch for map. Marker is in this post office area: Yellowstone National Park WY 82190, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Beauty and Chromatic Pools (about 800 feet away, measured in a direct line); Crested Pool (approx. 0.2 miles away); Castle Geyser (approx. 0.2 miles away); Giant Geyser (approx. 0.3 miles away); Daisy Geyser (approx. 0.4 miles away); Grotto Geyser (approx. 0.4 miles away); Beehive Geyser (approx. half a mile away); Riverside Geyser (approx. half a mile away). Touch for a list and map of all markers in Yellowstone National Park.
More about this marker. Pictures of Vent Geyser, Turban Geyser and Grand Geyser appear at the bottom of the marker. The top right of the marker contains a picture of Grand Geyser’s vent.
Photographed By Bill Coughlin, July 31, 2015
2. Grand Geyser Marker
Photographed By Bill Coughlin, July 31, 2015
3. Marker in the Upper Geyser Basin
Credits. This page was last revised on February 16, 2023. It was originally submitted on September 8, 2015, by Bill Coughlin of Woodland Park, New Jersey. This page has been viewed 308 times since then and 16 times this year. Photos: 1, 2, 3. submitted on September 8, 2015, by Bill Coughlin of Woodland Park, New Jersey.
