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1997 Map of Lemhi Pass

Name: 1997 Topographic Map of Lemhi Pass
Creator: U.S. Geological Survey
Published: 2002
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2002

About this map

Lemhi Pass serves as the central focal point for this landscape along the Continental Divide, where the border between Idaho and Montana follows the crest of the Beaverhead Mountains. This 1997 revision documents a high-altitude wilderness defined by the intersection of the Salmon National Forest and Beaverhead National Forest. The geography is inextricably linked to the Corps of Discovery, marked by the Lewis and Clark National Historic Trail and the Sacagawea Memorial Camp near Desert Fountain Spring.

Beyond its commemorative value as the Lemhi Pass National Historic Landmark, the map details a legacy of resource extraction. Numerous prospects and adits are scattered across the slopes, including the Copper Queen Mine on the Idaho side. Water management is evident through features like Flume Creek and Agency Creek, while the eastern Montana slopes are drained by the extensive networks of Frying Pan Creek and Everson Creek near Selway Ranch.