1955 Map of Dubois

About this map

The Continental Divide defines the spine of this mid-century survey, separating the high basins of the Beaverhead Mountains from the drainage of the Lemhi River. In the eastern valley, the Union Pacific railroad and U. S. 91 connect the settlements of Dubois and Lima, serving as a vital transport corridor between the high peaks. The landscape is a study in natural and industrial boundaries, from the massive blocks of the Salmon National Forest and Challis National Forest to the specialized perimeter of the National Reactor Testing Station in the south.