1955 Map of Dillon

About this map

Dillon serves as a central hub in this high-altitude landscape where the Continental Divide dictates the flow of major western waterways. The map captures the complex drainage systems of the Jefferson River, Big Hole River, and Beaverhead River before the full impact of modern interstate expansion. To the north and west, the Pintlar Wilderness and Beaverhead National Forest dominate the terrain, preserving a mid-century view of the Montana-Idaho border region. Local industry and transit are defined by the paths of the Burlington Northern and Milwaukee Road railroads, which connected valley settlements like Twin Bridges and Sheridan to larger markets. The placement of the Clark Canyon Reservoir and Ruby River Reservoir highlights the era's focus on water management for the surrounding basins, including the Sweetwater Basin and Big Hole Divide.