2020 Map of Lemhi Pass

About this map

Lemhi Pass marks the high-altitude transition between the Salmon National Forest and Beaverhead National Forest, serving as a critical point on the Continental Divide between Montana and Idaho. The landscape is defined by its legacy as a historic thoroughfare, traced by the Lewis And Clark Nht and the modern Lewis and Clark Hwy. The geography is carved by high-elevation drainage systems, including the headwaters of Agency Cr, Trail Cr, and the distinctively named Distant Fountain. This survey illustrates the convergence of recreational and historical paths, where the Continental Divide National Scenic Trail winds through a terrain of significant drainage basins like Frying Pan Cr and Bear Cr. The map's detailed boundary lines and survey markers emphasize the jurisdictional and natural barriers that have shaped movement through this mountain gap for centuries.