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1940 Map of Mt. Baden-Powell

Name: 1940 Topographic Map of Mt. Baden-Powell
Creator: U.S. Geological Survey
Published: 1940
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1940

About this map

The San Andreas Rift Zone carves a distinct geological path through this portion of the San Gabriel Mountains, creating the structural depression occupied by Jackson Lake. Surveyed in the mid-1930s, the map reveals a landscape defined by sharp elevation changes and deep drainage systems like Mine Gulch and Fenner Canyon. High peaks such as Mt Baden-Powell and Throop Peak anchor the central topography, while the north is dominated by the long spine of Pinyon Ridge.

Human activity in the Angeles National Forest is evidenced by recreation and industry. Early 20th-century social organizations are well-represented by the Boy Scout Camp, Girl Scout Camp, and Camp Manzanita. Economic history is centered on the Big Horn Mine situated on the eastern slopes, while the network of springs and forks, including Lamel Spring and the Prairie Fork, illustrates the critical water-management geography of Los Angeles County before the era of modern development.