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1963 Map of Obsidian, 1975 Print
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1963 Map of Obsidian

USGS Topo · Published 1975

About this map

The Salmon River flows through the high elevations of the Sawtooth Valley in this early 1960s survey of Custer County. The small settlement at Obsidian and the nearby Idaho Rocky Mtn Ranch represent the sparse human footprint in a landscape dominated by the boundary between the Challis National Forest and the Sawtooth National Forest. This era predates the formal designation of the surrounding wilderness areas, showing a network of primitive access points including a Jeep Trail following Fourth of July Creek. Water features like Yellow Belly Lake and Fisher Creek are clearly delineated, along with landmarks such as the Sawtooth Valley Ranger Station. The presence of a small Prospect and several Gravel Pits indicates the minor localized resource extraction occurring alongside the emerging recreational and ranching economy of the valley.

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Map Details

Date Portrayed1963
Date Published1975
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions22 x 26.9 inches

Editions of this 1963 Obsidian Map

Historical Maps of Custer County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain