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1956 Map of Hetch Hetchy Reservoir

Name: 1956 Topographic Map of Hetch Hetchy Reservoir
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

Hetch Hetchy Reservoir and the sheer granite walls of the Grand Canyon of the Tuolumne River dominate this mid-century survey of the northern backcountry. The map captures the infrastructure of the High Sierra before modern expansions, documenting the Spillway elevation and the winding course of the Tioga Road as it passes high-altitude landmarks like White Wolf and Dark Hole. In the south, the detail shifts to the iconic precipices of the Valley, including Yosemite Falls, North Dome, and Mount Watkins.

The wilderness character is defined by a network of creeks and alpine basins, from Tiltill Valley to the Ten Lakes region. Dozens of backcountry and roadside sites are noted, such as the Smoky Jack Campground and Yosemite Creek Campgrounds. This record provides a clear look at the Tuolumne and Mariposa county line and the Grant Boundary during a period of steady post-war recreational growth in Yosemite National Park.