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1993 Map of Adin Pass

Name: 1993 Topographic Map of Adin Pass
Creator: U.S. Geological Survey
Published: 1996
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1996

About this map

Schaffer Mountain dominates this northern section of the Modoc National Forest, where the high-altitude terrain transitions into the broad expanse of Round Valley. This 1993 revision, based on surveys dating back to 1958, provides a clear view of the industrial and settlement history of this part of Modoc County. The presence of the Conklin Sawmill (Site) near Harris Spring and the Lost Cabin Mine tucked into the slopes of Shake Canyon point to the region's historical reliance on timber and mineral extraction.

Water sources are vital landmarks across this landscape, with dozens of named springs such as Hoskins Spring, Rice Spring, and Antelope Spring appearing alongside seasonal drainages like Higgins Canyon. In the northwest, Stone Coal Valley sits near a marked Cem, indicating early rural settlement patterns. The topography is further defined by prominent flats and ridges, including Niles Flat and Ryan Ridge, which create a complex network of canyons and meadows.