|
Visit our keyboard shortcuts docs for details
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 FeaturesMore than 10,000 hydrothermal features are found here, of which more than 500 are geysers. 
Current Geyser ActivityGet the latest geyser eruption predictions. 
Old Faithful FAQsIs Old Faithful slowing down. Learn that and more. 
In Depth: GeysersLearn 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: September 13, 2022