This is a photo of Old Faithful geyser bubbling up just prior to eruption. It erupts approximately every 90 minutes, but times between can range from 45 to 110 minutes.
Lake Yellowstone RegionWest Thumb Geyser Basin
What to Know Before You GoThe Regions of Yellowstone National ParkVisitor Centers in Yellowstone National Park
Lodging and Camping Inside Yellowstone National ParkLodging and Camping Near Yellowstone National ParkTop Hotels Inside Yellowstone National Park
Angela Brown Northwest US Travel Guide
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