
The Coyote Mountains dominate the northwestern corner of this landscape, where the steep descent of Mendoza Canyon gives way to the broad expanse of the Altar Valley. The terrain is defined by an intricate network of drainage systems, including the prominent Brawley Wash and Altar Wash, which flow northward through the arid basin. Historically significant for ranching operations, the area is dotted with numerous water catchments such as San Patricio Tank, Saint George Tank, and Cactus Tank, which are vital for sustaining life in this dry climate.
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This is the sole edition of this map. No revisions or reprints were ever made.
1920 · Arivaca
USGS Topo · 1:125,000
1934 · Tucson Mountains
USGS Topo · 1:125,000
1934 · Silver Bell
USGS Topo · 1:125,000
1938 · San Vicente
USGS Topo · 1:62,500
1940 · Palo Alto Ranch
USGS Topo · 1:62,500
1941 · San Vicente
USGS Topo · 1:62,500
1941 · Cocoraque Butte
USGS Topo · 1:62,500
1941 · Baboquivari Peak
USGS Topo · 1:62,500
1942 · San Vicente
USGS Topo · 1:62,500
1943 · Cocoraque Butte
USGS Topo · 1:62,500