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1945 Map of Port San Luis

Name: 1945 Topographic Map of Port San Luis
Creator: U.S. Geological Survey
Published: 1945
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1945

About this map

The coastal shelf of Central California is defined here by the steep rise of the San Luis Range directly from the Pacific Ocean. This 1939 survey, published just after the war, captures the essential maritime infrastructure of Port San Luis and its connection to the interior via the P C Ry. The coastline is marked by numerous hazards and prominent navigational landmarks, from Lion Rock in the north to the jagged Pt San Luis and the nearby Whaler I.

Deep canyons like Diablo Canyon, Crowbar Canyon, and Wild Cherry Canyon carve through the coastal hills, illustrating the difficult terrain that historically isolated this stretch of shore. Inland, the map details the rugged topography of the San Miguelito land grant area, anchored by peaks such as Saddle Pk and Green Pk. The drainage of San Luis Creek provides a natural corridor into the hills, while isolated features like Pecho Rock stand out against the seafloor contours.