Loading map...

2017 Map of Obsidian

Name: 2017 Topographic Map of Obsidian
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Obsidian sits at the heart of this high-elevation landscape, where the upper reaches of the Salmon River wind through the Sawtooth Valley. The terrain is defined by a dense network of mountain drainages, including Hell Roaring Cr, Fourth of July Cr, and Champion Cr, which feed the river from the surrounding peaks. This 2017 survey illustrates the complex jurisdictional boundaries between the Sawtooth National Forest and Challis National Forest, highlighting the area's role as a protected wilderness and watershed.

In the southern reaches of the quadrangle, Yellow Belly Lake marks a significant glacial feature near the valley floor. The map traces the primitive transportation network of the era, from the main highway corridor to secondary routes like Valley Rd and numerous forest trails. Landforms such as Decker Flat and Club Canyon provide context for the local topography, showing the transition from wide valley bottoms to the steep, narrow canyons of the interior ranges.