Whale Peak stands as the central landmark of this high-desert region, anchoring the rugged terrain between the Vallecito Mountains and the Pinyon Mountains. The landscape is defined by a dense network of ephemeral watercourses including Chuckwalla Wash, Mine Wash, and Nolina Wash, which flow from the heights toward the alluvial plains of Mescal Bajada and Harper Flat. Cultural history is prominently represented by the Pictograph Trail, which winds through the southern reaches of Pinyon Mountain Valley near Little Blair Valley. This area serves as a significant intersection of arid topography and ancient pathways, where features like Smuggler Canyon and Bighorn Canyon suggest a history of both natural wildlife corridors and human passage through the San Diego County backcountry.
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This is the sole edition of this map. No revisions or reprints were ever made.
1931 · Vallecito
USGS Topo · 1:125,000
1931 · Carrizo
USGS Topo · 1:125,000
1939 · Borrego
USGS Topo · 1:62,500
1942 · Barrel Spring
USGS Topo · 1:62,500
1942 · Borego
USGS Topo · 1:62,500
1942 · Carrizo Mtn
USGS Topo · 1:62,500
1942 · Cuyapaipe
USGS Topo · 1:62,500
1943 · Vallecito
USGS Topo · 1:125,000
1947 · Santa Ana
USGS Topo · 1:250,000
1947 · Barrel Spring
USGS Topo · 1:62,500