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1986 Map of Ishi Caves

Name: 1986 Topographic Map of Ishi Caves
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

Ishi Caves (Yahi Indian Camp) serves as a significant cultural landmark within the Ishi Wilderness, a landscape shaped by deep canyons and volcanic ridges in the mid-1980s. This survey detail captures the complex drainage systems of the Lassen National Forest, where waterways like Mill Creek and Deer Creek have carved distinct flats and hollows, including Deer Creek Flat and the expansive Twentymile Hollow.

The presence of numerous remote outposts, such as Apperson Cow Camp, Leininger Camp, and Roberts Place, reflects a history of seasonal grazing and forest management. Higher elevations are marked by features like Skeleton Ridge and Brushy Mtn, while the State Game Refuge 1-G indicates the region's role in wildlife conservation. This provisional map provides a look at the transition between the dense timber of the high country and the brush-covered flats like Digger Pine Flat.