Lemhi Pass Road

Historic route where Lewis & Clark first crossed the Continental Divide. Gravel road to the Idaho-Montana border with monument at the pass. Beautiful mountain scenery and historic significance.

When to go: Summer and Fall typically offer the best window.

Status: Seasonal (June-Oct). Seasonal routes change with snowpack and storms — confirm with the managing ranger district before driving out.

Vehicles: Jeep/Truck, SUV, Adventure Bike. Standard offroad prep applies: appropriate tires, ground clearance, and a basic recovery kit.

Salmon Region context

The Salmon region is high, dry, and exposed. Mining-basin roads climb above 9,000 feet; valley roads thread the Lemhi and Lost River Ranges. Salmon, Challis, and Mackay are the only meaningful supply towns — and overlanders here most often underestimate distance between fuel.

Best for drivers who understand their vehicle and the cost of a mistake in remote country.