2020 Map of Bohannon Spring

About this map

The Continental Divide crests through the high country along the border of Lemhi and Beaverhead counties, where the high ridgelines of the Beaverhead Mountains separate the watersheds of Idaho and Montana. This high-altitude landscape is defined by its complex drainage network, where the headwaters of Bohannon Creek and Geertson Creek flow through the Salmon National Forest toward the valleys below. The map reveals a history of seasonal water access through numerous named sources such as Bohannon Spring, Chet Rowe Spring, and Sawmill Gulch Spring. The presence of Coal Mine Gulch Spring and several forest roads, including Bohannon Creek Road, suggest a landscape historically utilized for resource extraction and forestry. High peaks like Sacajawea Peaks and Center Mountain overlook remote alpine features such as Berry Lake, providing a clear record of the area's physical geography and boundary markers.