
Anza-Borrego Desert State Park defines this arid landscape at the border of Riverside and San Diego counties. The topography centers on the broad Collins Valley, where the drainage of Coyote Creek flows between the towering Santa Rosa Mts and Buck Ridge. This survey, field-checked in the late 1950s, documents the vital water sources required for survival and travel in the desert, including Middle Willows, Lower Willows, and isolated spots like Cottonwood Spring.
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5 editions found
1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1901 · San Jacinto
USGS Topo · 1:125,000
1903 · Ramona
USGS Topo · 1:125,000
1904 · Indio
USGS Topo · 1:125,000
1904 · Southern California Sheet No. 2
USGS Topo · 1:250,000
1904 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1931 · Vallecito
USGS Topo · 1:125,000
1939 · Warner Springs
USGS Topo · 1:62,500
1940 · Hemet Reservoir
USGS Topo · 1:62,500
1941 · Toro Peak
USGS Topo · 1:62,500