2014 Map of Lemhi Pass

About this map

Lemhi Pass stands as the central geographical and historical anchor of this high-elevation terrain, marking the boundary between Beaverhead National Forest in Montana and Salmon National Forest in Idaho. The Continental Divide snakes through the landscape, dictating the flow of numerous drainages including Agency Cr and Trapper Cr. This area is famously associated with the route of the Corps of Discovery, represented here by the Lewis and Clark Hwy. The map provides a detailed look at the complex hydrological system of the Bitterroot Mountains, with names like Ghoule Basin, Distant Fountain, and Magpie Gulch reflecting the early naming conventions of surveyors and frontiersmen. The western slopes are defined by deep canyons such as Bear Gulch, while forest roads like Frying Pan Rd provide access into the high timber of the Idaho-Montana borderlands.