Old Faithful, Natural geyser in Yellowstone National Park, Wyoming, United States.
Old Faithful releases superheated water and steam reaching heights of 180 feet during eruptions that occur approximately every 90 minutes.
The Washburn-Langford-Doane Expedition first documented and named this geyser in 1870, making it the first named geyser in Yellowstone National Park.
The geyser stands as a symbol of natural conservation and influenced the establishment of Yellowstone as the first national park in 1872.
Visitors can check precise eruption predictions at the Education Center or through the National Park Service mobile application.
Scientists have documented over one million eruptions of Old Faithful, with mathematical formulas developed to predict intervals between events.
Location: Teton County
GPS coordinates: 44.46045,-110.82818
Latest update: May 26, 2025 19:05
Geysers represent Earth's geological forces through their regular water eruptions. From Yellowstone to Kamchatka, these thermal springs display our planet's underground activity. The fountains reach heights of several meters and generate steam columns at regular intervals.
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