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What are the times that old faithful erupts at
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Yellowstone National Park, Wyoming, Kids Activities, Photography, Picnicking, Regional Activities, Touring
12 years ago
12 Answers

Hello ParkLover.  Great question!   Eruptions often occur about 90 minutes apart all day every day, but can range from 45 to 125 minutes without much warning.  All predictions are made using a formula that takes into account the length of the previous eruption. The formula which is completed by the National Park Service has proven to be accurate, plus or minus 10 minutes, 90% of the time.  The prediction information is only posted during the open-hours of the Old Faithful Visitor Center and uses the length of the previous eruption to predict the time of the next eruption.

The NPS has put up a "webcam" so you can try to catch a glimpse of the eruptions as they happen at home.  But you really need to be there in person to experience the wonder!

12 years ago