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2023 Map of South Chapin Mountain

Name: 2023 Topographic Map of South Chapin Mountain
Creator: U.S. Geological Survey
Published: 2023
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2023

About this map

Heglar sits at the junction of mountain canyons and the expansive Raft River Valley in this remote section of Cassia County. The landscape is defined by the high elevations of the Sublett Range and the twin peaks of North Chapin Mtn and South Chapin Mtn. This area serves as a critical drainage system, where Heglar Canyon and South Heglar Canyon funnel seasonal runoff toward the valley floor, supported by perennial water sources like Butler Spring and the winding course of Shirley Creek.

A network of local routes, including Heglar Canyon Rd and a grid of section-line roads such as 800 South Rd, provides access across the rugged terrain. These corridors follow the natural topography, linking the small settlement of Heglar to the surrounding high-country grazing lands and watershed management areas. The map illustrates the contemporary balance between high-desert ranching life and the wild, unpopulated stretches of the Idaho interior.