2018 Map of Keystone

About this map

Keystone and the rugged canyon of the Stanislaus River dominate this recent topographical survey of the Sierra Nevada foothills. The landscape is defined by its water management and distinct geology, featuring the prominent Table Mtn and the sprawling Red Hills. A critical piece of California's infrastructure, the Hetch-Hetchy Aqueduct, cuts across the terrain, carrying water from the mountains toward the coast. Local aviation is represented by the Kistler Ranch Airport, while several seasonal drainages like N Fork Dry Cr and Green Springs Run carve through the foothills. The map captures the meeting of three counties—Calaveras, Tuolumne, and Stanislaus—along the river and across the high ridges of Rushing Mtn, illustrating the complex topography where the Central Valley begins its ascent into the high sierra.