Old Faithful
Old Faithful is a cone geyser in Yellowstone National Park in Wyoming, United States. It was named in 1870 during the Washburn–Langford–Doane Expedition and was the first geyser in the park to be named. It is a highly predictable geothermal feature and has erupted every 44 minutes to two hours since 2000. The geyser and the nearby Old Faithful Inn are part of the Old Faithful Historic District.
| Old Faithful | |
|---|---|
Eruption of Old Faithful in 1948 | |
| Name origin | Named by Henry D. Washburn September 18, 1870 |
| Location | Upper Geyser Basin Yellowstone National Park Teton County, Wyoming, U.S. |
| Coordinates | 44.46046°N 110.82815°W |
| Elevation | 7,349 ft (2,240 m) |
| Type | Cone geyser |
| Eruption height | 106 to 185 ft (32 to 56 m) |
| Frequency | 60 to 90 minutes |
| Duration | 1½ to 5 minutes |
| Discharge | 3,700–8,400 US gal (14,000–32,000 L) |
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