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1930 Map of Casto

Name: 1930 Topographic Map of Casto
Creator: U.S. Geological Survey
Published: 1944
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1944

About this map

Mining operations and isolated mountain ranches define this central Idaho landscape in the late 1920s. The convergence of four different national forests—Salmon, Challis, Payette, and Idaho—demonstrates the vast wilderness management of the era. Settlement is sparse, appearing primarily as family-named outposts such as Falconberry Ranch, Ramey Ranch, and Boyle Ranch, often situated near life-sustaining water sources like Warm Spring Creek or the Middle Fork.

Industrial activity centers on the extraction of minerals, with the Yellowjacket Mine and Parker Mill highlighting the remote commercial interests of the region. The map also documents the administrative presence of the Forest Service at the Loon Cr. Ranger Sta. and Warm Springs Ranger Station. Significant peaks like Sleeping Deer and Pinyon Peak punctuate a terrain marked by an extensive network of trails, rather than roads, reflecting the difficulty of travel through these river-cut canyons and high summits.