1947 Map of Mariposa

About this map

Yosemite Valley and the surrounding High Sierra peaks dominate this mid-century survey, which details the complex interaction between water management and mountain geography. The map traces the critical flow of the Tuolumne River from the Hetch Hetchy Reservoir and the San Joaquin River as it enters Millerton Lake. High-altitude landmarks such as Mt Lyell and Mt Whitney are recorded alongside the sprawling boundaries of the Yosemite National Park and Stanislaus National Forest.