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1958 Map of Sleepy Valley

Name: 1958 Topographic Map of Sleepy Valley
Creator: U.S. Geological Survey
Published: 1959
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1959

About this map

The San Andreas Rift Zone creates a striking linear depression across this high-desert landscape, defining the northern edge of the Sierra Pelona range. In the late 1950s, the area remained largely pastoral, characterized by family-held properties like Ritter Ranch and the Annan Ranch. The Leona School serves as a central point for the Leona Valley community, which is concentrated along the Elizabeth Lake Road.

Resource extraction and mountain infrastructure are visible through the Gray Eagle Mine and the Pelona Lookout, which keeps watch over the Angeles National Forest. The map documents early suburban-style pockets such as White Heather and The Oaks along the Sierra Highway, illustrating the gradual transition from ranching to residential expansion. To the west, the Bouquet Reservoir and its associated canyon roads reflect the critical water and transport management essential to Los Angeles County's development.