Back Old Faithful Afrikaans أولد فيثفول Arabic Old Faithful Catalan Old Faithful Geyser CEB Old Faithful Czech Old Faithful Danish Old Faithful German Old Faithful Spanish Old Faithful Estonian الد فیتفول Persian
| Old Faithful | |
|---|---|
,_Old_Faithful_Geyser_--_2022_--_2599.jpg) Old Faithful erupting in 2022 | |
 | |
| Name origin | Named by Henry D. Washburn September 18, 1870 |
| Location | Upper Geyser Basin Yellowstone National Park Teton County, Wyoming, U.S. |
| Coordinates | 44°27′38″N 110°49′41″W / 44.46046°N 110.82815°W[1] |
| Elevation | 7,349 ft (2,240 m)[2] |
| 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) |
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.[3][4] It is a highly predictable geothermal feature and has erupted every 44 minutes to two hours since 2000.[5] The geyser and the nearby Old Faithful Inn are part of the Old Faithful Historic District.
- ^ "Old Faithful". Yellowstone Geothermal Features Database. Montana State University.
- ^ "Old Faithful Geyser". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. June 5, 1978. Retrieved September 18, 2017.
- ^ Bauer, Clyde Max (1947). Yellowstone Geysers. Yellowstone Park, Wyoming: Haynes, Inc. OCLC 1517713.
- ^ Cite error: The named reference
tourwas invoked but never defined (see the help page). - ^ Old Faithful Archived February 21, 2012, at the Wayback Machine, Geyser Observation and Study Association, August 17, 2011; "National Park Service Webcam". www.nps.gov. Retrieved January 1, 2017.