1967 Map of Borah Peak

About this map

Borah Peak dominates this high-altitude landscape in Custer County, Idaho, marking the highest point in the state within the Lost River Range. The 1967 survey captures the wilderness character of the Challis National Forest, where the topography shifts from the massive peaks of the Pahsimeroi Mountains down into the deep drainages of Cayuse Canyon and Mahogany Creek. High mountain travel is defined by narrow gaps like Doublespring Pass and Horseheaven Pass, essential transit points in this vertical terrain.