Yellowstone National Park in Park County, Wyoming — The American West (Mountains)
Grotto is perhaps the most unusual of Yellowstone’s geysers. Geologists believe that hundreds (or thousands) of years ago, Grotto Geyser emerged in a stand of dead or dying trees and, through time, deposited layer upon layer of siliceous sinter (silica) over the stumps and branches.
• Grotto’s initial eruption can reach heights of more than 40 feet, but then generally subsides to about 15 feet.
• The duration of Grotto’s eruption can vary from about 50 minutes to more than 24 hours.
Erected by National Park Service.
Location. 44° 28.306′ N, 110° 50.518′ W. Marker is in Yellowstone National Park, Wyoming, in Park County. Marker can be reached from Lower Grand Loop Road (U.S. 287), on the left when traveling south. Click for map. Marker is located in the Upper Geyser Basin in Yellowstone National Park. Marker is in this post office area: Yellowstone National Park WY 82190, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Giant Geyser (about 500 feet away, measured in a direct line); Riverside Geyser (about 600 feet away); Daisy Geyser (approx. 0.2 miles away); Fading Glory Beauty and Chromatic Pools (approx. 0.3 miles away); Grand Geyser (approx. 0.4 miles away); Crested Pool (approx. 0.6 miles away); Castle Geyser (approx. 0.6 miles away). Click for a list of all markers in Yellowstone National Park.
More about this marker. A map of the area appears on the marker, showing the locations of the marker as well as Daisy Geyser, Comet Geyser, Brilliant Pool, Splendid Geyser, Bonita Pool, Radiator Geyser and Bank Geyser.
Categories. • Natural Features •
Credits. This page originally submitted on , by Bill Coughlin of North Arlington, New Jersey. This page has been viewed 147 times since then and 25 times this year. Last updated on , by Steve Masler of Memphis, Tennessee. Photos: 1, 2, 3, 4. submitted on , by Bill Coughlin of North Arlington, New Jersey. • Andrew Ruppenstein was the editor who published this page. This page was last revised on June 16, 2016.