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1932 Map of Russell Valley

Name: 1932 Topographic Map of Russell Valley
Creator: U.S. Geological Survey
Published: 1932
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1932

About this map

Santa Monica Mountains peaks and steep-walled drainages dominate this portion of the western range near the Ventura and Los Angeles County line. The 1929 topography recorded by C.W.H.Nessler reveals a landscape defined by rugged canyons such as Triunfo Canyon and Lobo Canyon that cut through the land grants of El Conejo and Las Virgenes. Transportation is centered on the early route of the U.S. Ventura Highway No 101 and the winding Decker Road, reflecting the transition from agricultural ranch lands to a more accessible regional corridor.

The map highlights the geological and surveying framework of the era, specifically marking the San Bernardino Base Line. While the northern section of Russell Valley appears relatively open, the southern terrain is a dense network of ridges leading toward the coast. This study captures the area before the extensive suburban development of later decades, preserving the original land grant boundaries and local landmarks like Niggerhead Mtn and Little Trough Canyon.