1901 Map of Mt. Lyell

About this map

Yosemite National Park and the high peaks of the Central Sierra are documented here during a period of transition, shortly after the park's management passed from the state back to the federal government. The survey, conducted by R.B. Marshall at the turn of the century, captures the intricate hydrological network that defines the region, from the Mono Lake basin in the east to the headwaters of the Merced River. High-altitude landmarks like Mt. Lyell and Mt. Conness are depicted alongside early mountain infrastructure, such as the Clover Meadow Ranger Sta. The eastern edge of the sheet reveals the stark volcanic topography of Mono Craters and the Pumice Valley, contrasting with the glacial lakes of the high country like Tenaya Lake and Grant Lake. This period of mapping reflects the early push for conservation and the systematic documentation of the California wilderness.