
Owyhee Mountains foothills define the eastern edge of this high-desert landscape on the border of Oregon and Idaho. The terrain is characterized by a series of north-draining watercourses, including Succor Creek, Trimbley Creek, and Little Poison Creek, which carve through deep basins like Strode Basin and Spanish Charlie Basin. Water management is central to the area's utility, evidenced by a network of catchments such as Hot Rock Reservoir, Mitzi Reservoir, and Cunningham Reservoir. The boundary between Malheur County and Owyhee County runs north-to-south, reflecting the remote nature of this ranching and grazing land. Transportation is limited to rugged routes like Succor Creek Rd and Antelope Spring Rd, which follow the natural contours of the drainages and provide access to the prominent high point at Pole Creek Top.
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1892 · Silver City
USGS Topo · 1:125,000
1894 · Silver City
USGS Topo · 1:125,000
1898 · Nampa
USGS Topo · 1:125,000
1898 · Silver City
USGS Topo · 1:125,000
1906 · Mitchell Butte
USGS Topo · 1:125,000
1955 · Boise
USGS Topo · 1:250,000
1957 · Sands Basin
USGS Topo · 1:62,500
1958 · Boise
USGS Topo · 1:250,000
1958 · Homedale
USGS Topo · 1:24,000
1962 · Boise
USGS Topo · 1:250,000