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The Owyhee Mountains are a mountain range in Owyhee County, Idaho and Malheur County, Oregon.[2]

Owyhee Mountains
Owyhee Mountains.jpg
Highest point
PeakHayden Peak[1] (Owyhee County, Idaho)
Elevation2,561 m (8,402 ft)
Length40 mi (64 km) NNW-SSE
Owyhee Mountains is located in Idaho
Owyhee Mountains
location of Owyhee Mountains in Idaho [2]
CountryUnited States
StateIdaho, and Oregon
DistrictOwyhee County, Idaho and Malheur County, Oregon
Range coordinates42°58′51″N 116°39′31″W / 42.98083°N 116.65861°W / 42.98083; -116.65861Coordinates: 42°58′51″N 116°39′31″W / 42.98083°N 116.65861°W / 42.98083; -116.65861
Parent rangeOwyhee Mountain Range
Topo mapUSGS Cinnabar Mountain

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.[3]

The southeastern end of the range including the old mining area west of Silver City is referred to as the Silver City Range.[4] About 8.3 kilometres (5.2 mi) west of Silver City is the De Lamar ghost town in Jordan Creek below the mine workings on De Lamar Mountain to the south.[4] The area was active in the late 1880s. In the 1970s mining began again with the development of open pit silvergold mines on De Lamar Mountain.[5][6]


  1. ^ Cinnabar Mountain, Idaho, 7.5 Minute Topographic Quadrangle, USGS, 1990
  2. ^ a b "Owyhee Mountains". Geographic Names Information System. United States Geological Survey.
  3. ^ Cummings, Michael L., et al., Stratigraphic and structural evolution of the middle Miocene synvolcanic Oregon-Idaho graben, Geological Society of America Bulletin, 2000; v. 112, no. 5; pp. 668-682
  4. ^ a b Murphy, Idaho, 30x60 Minute Topographic Quadrangle, USGS, 1986
  5. ^ Bonnichsen, Bill; Epithermal Gold and Silver Deposits Silver City–De Lamar District, Idaho, University of Idaho, Idaho Geological Survey, Technical Report 83-4, 1983 PDF
  6. ^ De Lamar, Idaho, 7.5 Minute Topographic Quadrangle, USGS, 1990

Further readingEdit

  • Adams, Mildretta (1986) Sagebrush Post Offices, A History of the Owyhee Country, Idaho State University Press ISBN 978-0937834138