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1999 Map of Thompson Pass

Name: 1999 Topographic Map of Thompson Pass
Creator: U.S. Geological Survey
Published: 2003
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2003

About this map

The Halfway House Historic Site sits at a critical junction in the Bitterroot Mountains along the state line between Idaho and Montana. This high-altitude landscape is defined by the convergence of the Coeur d'Alene National Forest, Kaniksu National Forest, and Lolo National Forest. The map documents a rugged transit corridor where the Wallace Thompson Falls road winds through topographic obstacles like Thompson Pass and Glidden Pass.

Evidence of historical resource extraction is visible through numerous labels for Prospect and Adit sites scattered across Glidden Ridge and the drainages of Prichard Creek and Canyon Creek. High mountain basins hold pristine water bodies such as Revett Lake, Pear Lake, and the Blossom Lakes. The topography serves as a divide between the Little North Fork South Fork Coeur d'Alene River and the eastern-flowing Evans Gulch, illustrating the complex drainage patterns of the northern Rockies.