McCoy Mountains dominate the eastern portion of this arid landscape, providing a dramatic vertical contrast to the surrounding desert flats. The terrain is defined by its severe drainage patterns and alluvial fans that spread across the valley floor, revealing the slow geological movement of this portion of Riverside County. At the heart of these slopes, McCoy Spring appears as a critical water source in an otherwise parched environment, a point of survival that has historically dictated travel and activity in the region.
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This is the sole edition of this map. No revisions or reprints were ever made.
1942 · Blythe
USGS Topo · 1:250,000
1945 · Midland
USGS Topo · 1:62,500
1952 · Midland
USGS Topo · 1:62,500
1952 · Mc Coy Spring
USGS Topo · 1:62,500
1952 · Sidewinder Well
USGS Topo · 1:62,500
1952 · Palen Mountains
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1955 · Salton Sea
USGS Topo · 1:250,000
1959 · Salton Sea
USGS Topo · 1:250,000
1963 · Salton Sea
USGS Topo · 1:250,000