
The Malheur National Forest dominates this landscape along the border of Grant and Harney counties, where water management defines the high-desert terrain. A complex network of reservoirs, such as Skagway Reservoir, Slate Reservoir, and Dead Horse Reservoir, suggests a region heavily utilized for livestock grazing and land management. The North Fork Malheur River carves a deep valley through the center of the sheet, joined by tributaries like Flag Creek and Smith Creek. These water sources were vital for the survival of remote ranching operations within the forest boundaries.
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1908 · Ironside Mountain
USGS Topo · 1:125,000
1955 · Burns
USGS Topo · 1:250,000
1955 · Canyon City
USGS Topo · 1:250,000
1958 · Burns
USGS Topo · 1:250,000
1959 · Burns
USGS Topo · 1:250,000
1959 · Canyon City
USGS Topo · 1:250,000
1966 · Beulah
USGS Topo · 1:62,500
1968 · Drewsey
USGS Topo · 1:62,500
1970 · Flag Prairie
USGS Topo · 1:62,500
1970 · Castle Rock
USGS Topo · 1:62,500