2024 Map of Borah Peak

About this map

Borah Peak dominates the southern reaches of this high-altitude landscape, marking the apex of the Lost River Range within the Challis National Forest. This modern 2024 survey documents the complex topography of the Pahsimeroi Mountains, where primitive routes like the Borah Peak Trl and the Camp Spur Trl provide access to the high ridgelines. Movement through the area is defined by natural gaps in the terrain, most notably Doublespring Pass and Horseheaven Pass, which connect the deep incisions of Cayuse Canyon to the surrounding basins. Water sources are critical landmarks in this environment, with named features such as Freshwater Spring, Mule Spring, and Birch Springs located along the flanks of the mountains. Several drainage systems including Doublespring Creek and Mahogany Creek are clearly delineated, illustrating the watershed patterns that have shaped the local geology.