Bitterroot Divide Road (Forest Road 739)

Forest Road 739 snakes along the Bitterroot Divide at 7,000+ feet, straddling the Montana-Idaho state line through some of the most remote wilderness in the lower 48. This knife-edge ridge route connects Highway 93 south of Darby to Forest Road 5631 near the Selway River, threading between designated wilderness areas where cell service died 30 miles ago. The road surface alternates between loose rock and ancient roadbed carved by Depression-era CCC crews, with several creek crossings that can run deep during snowmelt.

This is solid intermediate territory requiring high-clearance 4WD and recovery gear — the narrow shelf road has few turnarounds and zero room for error. Best tackled July through September when snow clears, though afternoon thunderstorms can turn the route into a muddy nightmare. No permits needed, but fuel up in Hamilton and pack water for 2-3 days. Dispersed camping is outstanding along the divide, with endless peaks stretching into Idaho’s Frank Church Wilderness. You’ll earn every mile of this backcountry masterpiece.