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Geysers of the World   

Geysers of Yellowstone   



  Boulder Spring
Feature Type: Geyser
Geyser/Spring Type: Fountain geyser

Lower Geyser Basin
Sentinal Meadows Group

Boulder Spring lies at the boulder-strewn eastern end of the hill that borders the southern edge of Sentinel Meadows. Since Boulder Spring erupts continuously, it is classed as a perpetual spouter rather than a geyser. The hot spring is situated amidst a jumble of large boulders. The eruption periodically increases and decreases in force with heights varying between one and six feet.

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Please note - this site is currently under constuction. Please visit for more information.  Last update 01-29-2017

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