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1939 Map of Azusa

Name: 1939 Topographic Map of Azusa
Creator: U.S. Geological Survey
Published: 1939
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1939

About this map

The San Gabriel Mountains dominate the northern landscape of this 1930s survey, rising sharply above the alluvial plains of the San Gabriel River and Sawpit Wash. This era shows a distinctive concentration of health facilities at the mountain base, including the Canyon Tuberculosis Preventatorium and multiple sanitariums near Duarte. The transition from the Angeles National Forest wilderness to the urbanizing corridor is marked by recreational landmarks like Monrovia Mtn Park and the South Pasadena Veterans Camp.

Transportation networks define the southern settlements, where the Pacific Electric and Southern Pacific railroads parallel Foothill Boulevard. The map captures Azusa and Monrovia during a period of steady growth, balancing residential expansion with the natural flood channels of Dalton Wash and Fish Canyon. Local education and community roots are anchored by sites such as the Margaret Heath School and Liveoak Cemetery.