Lonesome Highway — Gravelly Range Road to Wade Lake via Centennial Valley Rim
Montana's forgotten ridge above the Centennial wild.
The Gravelly Range Road runs the spine of a little-known Montana range that separates the Madison Valley from the vast Centennial Valley, one of the least-visited wildlife corridors in the Lower 48. You pick it up west of Ennis and climb fast — past aspen groves and open sage parks — onto a high gravel crest that in places feels more like Wyoming than Montana. Wade Lake sits in a glacial pocket on the north slope of the range, cold and clear, ringed by lodgepole. The road passes through active cattle-grazing allotments, so expect gates. From the high point near Coffin Mountain, on a clear day you can see the Tetons to the southeast and the Snowcrests to the west.
Difficulty is Moderate — maintained gravel with some rocky sections near the summit. A stock high-clearance vehicle handles it in dry conditions but early-season snow or late-fall mud can shut the high section down fast. No permit required. Dispersed camping is available on the Beaverhead-Deerlodge National Forest sections; Wade Lake has a small USFS campground with vault toilets. Fuel in Ennis before you leave — there is nothing on the range. Cell service drops out within a few miles of the pavement. Best windows are July through September.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | High Clearance, Overland Route, Scenic Drive |
| Surface | Dirt, Gravel |
| Features | Camping, High Altitude, Remote, Scenic, Wildlife |
| Length (miles) | 42 mi / 67.6 km |
| Duration | 1-2 days |
| Max elevation (ft) | 9360 ft |
| Best season | July-September |
| Minimum vehicle | Stock high-clearance 4x4 |
| Nearest town | Ennis, MT |
| Land manager | USDA Forest Service — Beaverhead-Deerlodge National Forest |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | fs.usda.gov |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock 4Runner or Wrangler handle this without any mods?
Yes — a stock high-clearance 4x4 is the minimum and it's genuinely sufficient here. The dirt and gravel surface is rough and uneven but doesn't demand lockers or a lift; just don't attempt it in a sedan or crossover.
When does this route actually open and close each year?
July through September is the reliable window. Snow can linger on the 9,000+ ft ridgeline well into June and can return by October — check with Beaverhead-Deerlodge National Forest directly before an early or late season attempt.
Do I need a permit or does it cost anything to run this route?
No permit required and no fee to drive the route itself. Dispersed camping on Beaverhead-Deerlodge National Forest land is free; standard Leave No Trace rules apply and you're expected to follow posted forest closures.
What's the hardest section and what makes it sketchy?
The ridgeline stretch along the Centennial Valley rim is the crux — narrow shelf road, loose gravel, exposed drop-offs, and no guardrails. It's not a white-knuckle technical crawl, but one wrong move on a slick or soft section after rain puts you in a bad spot 9,000 feet from nowhere.
There's zero cell service — how far is it to fuel and what's the water situation on trail?
Top off in Ennis before you leave; there's no gas between the trailhead and Wade Lake and you're covering 42 miles of remote mountain road. Water crossings exist on the route but treat everything — bring enough capacity to not rely on finding a crossing when you need it.
Trail track
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