1958 Map of Dubois

About this map

Borah Peak and the high summits of the Lost River Range dominate this 1958 survey of the high desert and mountain frontier where Idaho meets Montana. The landscape is defined by the Continental Divide, which snakes through the Beaverhead Mountains and across Monida Pass, a critical corridor for the Union Pacific railroad and U.S. 91. Resource extraction and agricultural research are evident in the scatter of high-altitude operations, including the Elmira Mine and the Sheep experimental station near Dubois. Along the southern valley floor, irrigation and drainage patterns emerge around Mud Lake and the Little Lost River. This era shows a transition in transit, with several stretches labeled as Dismantled railroad appearing alongside the primary highway network of U.S. 93 and its alternate routes serving the ranching communities of Camas and Small.