2011 Map of Bohannon Spring

About this map

Coal Mine Gulch Spring and Sawmill Gulch Spring mark the western slopes of the Beaverhead Mountains in this high-altitude landscape. The hydrology of the region is defined by a complex network of drainages including Geertson Creek, Bohannon Creek, and Wimpey Creek, which flow through deep canyons and gulches. Evidence of early resource management appears through structures like Geertson Dam and Bohannon Dam, while high-elevation water bodies such as Hamby Lake and Berry Lake are situated near the prominent Center Mountain. The road network is sparse, primarily consisting of rugged tracks like Bohannon Creek Rd and Windy Crk, reflecting the area's primary use for ranching, mining, and watershed protection. This survey captures a moment in the modern management of this remote borderland, where seasonal springs and narrow creek forks dictate the movement of both people and livestock across the Idaho-Montana line.