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1955 Map of Mount San Antonio

Name: 1955 Topographic Map of Mount San Antonio
Creator: U.S. Geological Survey
Published: 1972
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1972

About this map

Mount San Antonio (Old Baldy) serves as the geographic anchor for this high-altitude survey of the San Gabriel Mountains. The landscape is defined by the massive San Andreas Rift Zone cutting across the northern reaches near Wrightwood. A legacy of high-country mining is visible through numerous workings, including the Big Horn Mine on Bghorn Ridge and the Native Son Mine near Prairie Fork.

Logistical and recreational outposts like Prairie Fork Guard Sta, Camp Maria Stella, and Weber Camp are scattered across the steep drainage basins of Vincent Gulch and Cattle Canyon. The intricate network of ridges, including Pine Mountain Ridge and San Antonio Ridge, reveals a terrain where the primary human presence was limited to seasonal camps, forest management, and hard-rock extraction. Transportation is concentrated along the Angles Crest Highway and the Blue Ridge Trail, providing access to peaks like Mount Harwood and Dawson Peak.