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1956 Map of Sonora Pass

Name: 1956 Topographic Map of Sonora Pass
Creator: U.S. Geological Survey
Published: 1959
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1959

About this map

The High Sierra crossing at Sonora Pass serves as the focal point for this 1956 topographic study, marking the high-altitude boundary where Stanislaus National Forest meets the Toiyabe National Forest. The landscape is defined by its seasonal use and military footprint, notably featuring the Marine Corps Cold Weather Camp near the Pickel River and the Millie Lake Campground. Genealogists and local historians can locate the historic Leavitt Sta (Site) on the eastern slopes, a remnant of early travel through these mountains.

Water systems are extensively mapped, from the headwaters of the East Fork Carson River to the alpine basins containing Leavitt Lake, Fremont Lake, and Poore Lake. The terrain is punctuated by significant summits like Disaster Peak, Whitecliff Peak, and Wells Peak, while smaller livestock-related features such as Connels Cow Camp hint at the area's grazing history. This edition captures the infrastructure of the Sierra Nevada before modern expansions, preserving the location of remote springs and trails used by mid-century backcountry travelers.