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.

The Fort Rock Valley Historical Homestead Museum is located in Fort Rock, Oregon, United States. Opened in 1988, it is a collection of original homestead-era buildings including a church, school, houses, homestead cabins, and several other buildings assembled in a village setting. The structures were moved to the museum site from various locations around the Fort Rock Valley, named for volcanic landmark Fort Rock. Most of the buildings contain historic items used by local homesteaders including furniture, dishes, household products, and tools. The museum is open for self-guided tours from Memorial Day weekend through Labor Day weekend.