The Owyhee Mountains are a mountain range in Owyhee County, Idaho and Malheur County, Oregon. Mahogany Mountain and the associated volcanic craters of the Lake Owyhee volcanic field are in the Owyhee Mountains of Oregon just east of the Owyhee Reservoir on the Owyhee River.
Elevation: 2,561 m (8,402 ft)
Peak: Hayden Peak, Owyhee County, Idaho
Length: 40 mi (64 km) NNW-SSE
Country: United States
State(s): Idaho, and Oregon
District(s): Owyhee County, Idaho and Malheur County, Oregon