Lonesome Highway — Centennial Road to Sula via the Bitterroot Divide Back Road
Montana's loneliest Bitterroot Divide crossing.
Drop south out of Wisdom on MT-43, hang a left onto the Chief Joseph Pass road system, and you’re already committed to one of Montana’s loneliest high-country corridors. The route climbs to Chief Joseph Pass at roughly 7,264 feet — a Lewis and Clark–era divide — then threads forest roads through Bitterroot National Forest toward Sula. Deadfall, mud bogs, and creek crossings that swell fast in June will remind you this isn’t a Sunday drive. The payoff is corridor elk habitat, panoramic Big Hole Valley views, and a complete absence of tourist traffic even in peak summer.
This is a moderate-to-difficult route depending on season — early summer means soft shoulders and water on the road, late season means early snow above 6,500 feet. You want a high-clearance 4WD with a solid skid plate and a recovery kit. No fuel between Wisdom and Sula proper, so top off before you go. No cell service to speak of. Dispersed camping is permitted throughout Bitterroot National Forest. Best window is mid-July through mid-September. Carry a topo — Forest Service roads here branch confusingly.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, Overland Route |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, High Altitude, Historic, Remote, Scenic |
| Length (miles) | 48 mi / 77.2 km |
| Duration | 1-2 days |
| Max elevation (ft) | 7264 ft |
| Best season | July-September |
| Minimum vehicle | High-clearance 4WD |
| Nearest town | Wisdom, MT |
| Land manager | Bitterroot National Forest, Sula Ranger District |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | Bitterroot NF Sula Ranger District Bitterroot NF Motor Vehicle Use Map |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner handle this route, or do I need a lifted rig?
A stock high-clearance 4WD like a Tacoma or 4Runner can manage this route in good conditions, but low-range will be needed on steeper pitches near the divide. A lift helps but isn't required — what matters more is decent ground clearance and a locking diff or good A/T tires if the road is wet or soft.
When does this road typically open and close for the season?
July through September is the reliable window. Snow can linger on the divide well into June, and early fall storms can close the road fast — sometimes by mid-October. Don't assume it's open just because it's summer; call the Sula Ranger District before you go.
Do I need a permit to drive or camp on this route?
No permit required to drive the route. Dispersed camping is allowed on Bitterroot National Forest land — standard rules apply: 16-day stay limit, 200 feet from water sources, pack out everything. No fee. Confirm current motor vehicle use with the Bitterroot NF Motor Vehicle Use Map before your trip.
What's the hardest section and what should I actually expect?
The steepest, roughest stretch is near the Bitterroot Divide crossing where the road narrows, grades pitch up, and the surface gets loose and rocky. It's not a white-knuckle trail, but if the road is wet, those sections get slick fast and ruts deepen. Allow extra time — pushing 48 miles of backcountry dirt at trail speed takes longer than it looks on a map.
There's no cell service on this route — how far is the nearest fuel from each end?
Wisdom, MT is your last reliable fuel stop before the eastern start near Centennial Road — fill up there. Coming out the Sula end, the Sula Store has fuel but hours are limited and supply isn't guaranteed; don't count on it as your primary plan. Carry a spare fuel can — the nearest town with a real gas station in either direction is a long way off bad road if you come up short.
Trail track
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