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2011 Map of Thompson Pass

Name: 2011 Topographic Map of Thompson Pass
Creator: U.S. Geological Survey
Published: 2011
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2011

About this map

Thompson Pass and Glidden Pass serve as the primary gateways through this high-altitude section of the Bitterroot Mountains, defining the border between Shoshone County, Idaho, and Sanders County, Montana. The 2011 landscape is dominated by the complex drainage systems of Prospect Creek flowing eastward and the Little North Fork South Fork Coeur d'Alene River to the west. This geography represents a classic high-country transport network where State Hwy 4 and various Forest Service routes like Nat For Dev Rd 9 follow the natural contours of the ridges and gulches.

Water features are prominent throughout the higher elevations, including the clustered Blossom Lakes and the tiered Upper Glidden Lake and Lower Glidden Lake. These alpine basins are surrounded by named summits such as Beaver Peak, Clear Peak, and Andys Knob. The map provides a detailed view of the terrain that shaped regional movement, from the steep ascent of Sullivan Gulch to the broad drainage of Twentyfour Mile Creek.