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1972 Map of Otay Mountain, 1984 Print
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1972 Map of Otay Mountain

USGS Topo · Published 1984

About this map

The San Ysidro Mountains dominate this rugged Southern California landscape, where the international boundary between the United States and Mexico cuts across the southern terrain. This 1970s survey captures a transition point between the upland slopes of Otay Mountain and the remote drainage systems of Cottonwood Creek and the Tijuana River. Traces of early 20th-century industry and infrastructure are preserved in the presence of the Donohoe Mine and several gaging stations along the creek beds, while the Dulzura Community Center serves as a small anchor for the sparse local population. The map's network of unpaved routes, such as the Minnewawa Truck Trail and the Otay Mtn Truck Trail, reveals a landscape managed for fire access and telecommunications, evidenced by the clusters of Radio Towers at high elevations. Water sources like Echo Spring and Lupe Spring are vital markers in this arid region, providing historical context for early ranching and mining operations in Marron Valley.

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Map Details

Date Portrayed1972
Date Published1984
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions21.76 x 26.79 inches

Editions of this 1972 Otay Mountain Map

Historical Maps of San Diego County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain