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1940 Map of Valyermo

Name: 1940 Topographic Map of Valyermo
Creator: U.S. Geological Survey
Published: 1949
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1949

About this map

The San Andreas Rift Zone creates a dramatic geological break across this 1940s landscape, where the southern edge of the Antelope Valley meets the rising San Gabriel Mountains. This intersection of high desert and alpine terrain defined the early 20th-century settlement patterns of the region. Local water sources like Big Rock Creek and various mountain springs supported a series of established holdings, including the Valyermo Ranch, Big Rock Ranch, and Anderson Ranch.

Infrastructure in the Angeles National Forest is well-documented, showing the Valyermo Ranger Sta and the Big Rock Patrol Sta positioned to monitor the forest boundaries. The transport network relies on the Pear Blossom Highway and Tejon Road, which provided essential links for the scattered communities of Valyermo, Longview, and Old Point Comfort. Evidence of early industry and resource management appears through features like the Limekiln and the extensive Ditch systems near the northern reservoir.