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1955 Map of Mustang Peak

Name: 1955 Topographic Map of Mustang Peak
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

Gill Ranch sits in the northern reaches of this landscape, a prominent marker of human presence in a terrain defined by deep canyons and seasonal water sources. The 1955 survey illustrates a network of transit carved through the hills, including the Red Creek Road and several Jeep Trails that connect remote flats like Paradise Flat and Mustang Flat. This mid-century view captures the area before modern developments, showing a reliance on isolated water points such as Bullhead Reservoir and Oak Springs Reservoir.

Surveyors from the Geological Survey documented the dividing line between Stanislaus and Santa Clara counties as it traverses high points like Mustang Peak and Pine Springs Hill. The drainage patterns are clearly visible, with Orestimba Creek flowing north and North Fork Pacheco Creek in the south, while specialized features like a Landing Strip near the Orestimba forks suggest the logistical challenges of accessing this backcountry in the 1950s.