1955 Map of Dubois

About this map

The Continental Divide snake-like path defines the high-altitude topography of this 1955 survey, marking the jagged spine of the Beaverhead Mountains and separating the drainages of Idaho and Montana. The region is characterized by immense north-south mountain ranges including the Lemhi Range and Lost River Range, which hem in significant valleys like the Thousand Springs Valley. Along the eastern plains, the industrial and scientific footprint of the mid-20th century is evident at the National Reactor Testing Station and the United States Sheep Experiment Station near Dubois.