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1958 Map of Glascock Mtn

Name: 1958 Topographic Map of Glascock Mtn
Creator: U.S. Geological Survey
Published: 1965
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1965

About this map

Cache Creek carves a deep path through the rugged Northern California interior, serving as the primary geographical divider between the high ridges of the Swanson Range and Blue Ridge. This late 1950s survey captures a landscape of extreme relief, defined by the towering Cortina Ridge and the prominent Glascock Mtn. The terrain is marked by dozens of seasonal drainages such as Brophy Canyon and South Jackson Canyon, which reveal the complex hydrology of the eastern Coast Ranges.

Evidence of early land use is found in the scattered water sources and topographical features like Glascock Spring, Sulphur Spring, and Buck Island. The map also delineates the jurisdictional boundaries where Colusa, Lake, and Yolo counties converge, alongside the Rumsey Rancheria. This area remains largely dominated by its natural landforms, with a network of jeep trails and the Cache Creek Trail providing the only access through the steep canyons of The Redlands.