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1941 Map of Port San Luis

Name: 1941 Topographic Map of Port San Luis
Creator: U.S. Geological Survey
Published: 1941
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1941

About this map

The coastal interface of the Diablo Range meets the Pacific Ocean in this survey based on data from 1939. The map centers on the steep, dramatic topography of the Central Coast, where peaks like Saddle Pk and Green Pk rise abruptly from the shoreline. The settlement at Port San Luis serves as the primary maritime anchor, sheltered by the prominent headland at Pt San Luis.

Maritime hazards and landmarks are carefully noted, including Pecho Rock and Lion Rock, alongside smaller features such as Whaler I and Lone Black Rock. The inland terrain is defined by deep cuts such as Crowbar and various unnamed canyons that drain the hills of San Miguelito. This preliminary edition documents the area's shoreline and high-relief landscape just before the mid-century developments in San Luis Obispo County.