Fort Rock
Fort Rock is a tuff ring located on an ice age lake bed in north Lake County, Oregon, United States. The ring is about 4,460 feet (1,360 m) in diameter and stands about 200 feet (60 m) high above the surrounding plain. Its name is derived from the tall, straight sides that resemble the palisades of a fort. The region of Fort Rock–Christmas Lake Valley basin contains about 40 such tuff rings and maars and is located in the Brothers Fault Zone of central Oregon's Great Basin. William Sullivan, an early settler in the area, named Fort Rock in 1873 while searching for lost cattle.
| Fort Rock | |
|---|---|
Aerial view of Fort Rock from the northeast. | |
| Highest point | |
| Elevation | 4,699 ft (1,432 m) NAVD 88 |
| Prominence | 345 ft (105 m) |
| Coordinates | 43°22′20″N 121°04′26″W |
| Geography | |
| Location | Lake County, Oregon, U.S. |
| Parent range | Basin and Range |
| Geology | |
| Age of rock | 50,000 to 100,000 years |
| Mountain type | Tuff ring |
| Climbing | |
| Easiest route | Trail |
U.S. National Natural Landmark | |
| Designated | 1976 |
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