Lonesome Highway — Little Missouri Badlands to Marmarth via Chalky Buttes Back Road
Fossil badlands on a road the maps almost forgot.
The Chalky Buttes are the forgotten badlands — not Theodore Roosevelt National Park, which pulls all the traffic, but the raw, unmanaged terrain south of Bowman where the Little Missouri River cuts through clay and bentonite formations in colors that shift from chalk white to burnt orange depending on the light. The back road from Rhame south toward Marmarth threads through BLM grazing leases, crosses seasonal creek drainages, and skirts buttes that look more like the painted desert than the northern plains. Marmarth itself is a genuine ghost town with a functioning diner and some of the richest fossil beds in North America — T. rex specimens have come out of the hills surrounding it.
This is a fair-weather road. Bentonite clay turns to grease in wet conditions and will swallow tires regardless of how capable your rig is — experienced overlanders have been stuck here in drizzle. In dry conditions, a high-clearance 2WD can manage most of it, but 4WD is smart insurance. No permits required, dispersed camping on BLM land. Fuel in Bowman or Dickinson before heading out — Marmarth has limited services. Best window is June through September. Carry water and let someone know your plan.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Dirt, Gravel |
| Features | Camping, Historic, Remote, Scenic |
| Length (miles) | 54 mi / 86.9 km |
| Duration | 1-2 days |
| Max elevation (ft) | 3200 ft |
| Best season | June-September |
| Minimum vehicle | High-clearance 2WD (4WD recommended) |
| Nearest town | Bowman, ND |
| Land manager | BLM Dakotas Field Office |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | BLM North Dakota Field Office |
| 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 trail, or do I need a lifted rig?
A stock high-clearance 4WD like a Tacoma or 4Runner is fine for normal conditions. The trail is rated moderate, but the clay-heavy gumbo surface turns into a greasy, axle-sucking mess after rain — 4WD and decent all-terrain tires are worth having, not optional.
What's the trail like after rain? Is it seasonal?
Stick to June through September and check recent weather hard before you go. The Chalky Buttes section is bentonite clay — it becomes impassable and dangerously slick when wet, and it doesn't need much rain to get there. If it rained in the last 48 hours, wait it out.
Do I need a permit to drive this route or camp along it?
No permit required. The route crosses BLM land managed by the North Dakota Field Office, and dispersed camping is allowed on BLM parcels — just follow Leave No Trace and stay on existing two-tracks. No fees, no reservations.
What's the hardest section and what should I actually expect?
The toughest stretch is through the Chalky Buttes where the road narrows, climbs, and cuts through eroded terrain with no bailout options for miles. Expect rough washboarding, some loose shelf sections, and possible water crossings that may be deeper after spring runoff — nothing that should stop a capable rig in dry conditions, but it demands attention.
How far is it between gas and water on this route? Should I carry extra?
Yes, carry both. Bowman is your last reliable fuel before heading out, and Marmarth has limited services — don't count on anything in between. There's no treated water on route, so bring all you need; the water crossings are not drinking sources.
Trail track
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