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Old Faithful was once called “Eternity’s Timepiece” because of the regularity of its eruptions. However, this geyser never erupted at exact hourly intervals as many believe. Ranger Darlene Bos explains how we predict eruptions for this popular geyser. Additional filming by David Restivo and Jay Elhard. 
Predict Old FaithfulCalculate your own prediction for Old Faithful's next eruption. 
Hydrothermal FeaturesYellowstone preserves earth's most extraordinary collection of hot springs, geysers, mudpots, fumaroles, and travertine terraces. 
Current Geyser ActivityGet the latest geyser eruption predictions. 
Old Faithful FAQsIs Old Faithful slowing down. Learn that and more. 
Geyser Video - Yellowstone IndepthLearn about the mechanics of geysers, their role in the park's history and what they teach us about the world in which we live. |
Last updated: August 20, 2018