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Old Faithful Geyser

World's Most Famous Geyser

Geyser in Upper Geyser Basin, Old Faithful Group on Firehole River, Myriad Creek in Yellowstone NP, Rocky Mountains near Old Faithful, WY

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Old Faithful is a cone geyser located in Yellowstone National Park in Wyoming, United States. Old Faithful was named in 1870 during the Washburn-Langford-Doane Expedition and was the first geyser in the park to receive a name. It is a highly predictable geothermal feature; since 2000, it has erupted every 44 to 125 minutes. The geyser, as well as the nearby Old Faithful Inn, is part of the Old Faithful Historic District.