
Anza-Borrego Desert State Park dominates this 1950s survey, revealing a landscape defined by seasonal water sources and early desert transit routes. The presence of numerous named desert oases, such as Hellhole Palms, Maidenhair Falls, and Yaqui Well, underscores the critical importance of reliable hydrology in this arid region. From the elevations of Pinyon Ridge and the Grapevine Hills, the terrain descends into the broad expanse of Borrego Valley, where the burgeoning settlement of Borrego Springs is visible alongside the established Chimney Rock Ranch.
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4 editions found
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
1931 · Vallecito
USGS Topo · 1:125,000
1939 · Warner Springs
USGS Topo · 1:62,500
1939 · Santa Ysabel
USGS Topo · 1:62,500
1939 · Borrego
USGS Topo · 1:62,500
1941 · Clark Lake
USGS Topo · 1:62,500
1942 · Clark Lake
USGS Topo · 1:62,500
1942 · Borego
USGS Topo · 1:62,500