Magruder Corridor Road — Red River to Elk City via the Selway-Bitterroot Wilderness Divide
100 miles of wilderness divide with zero bailouts.
The Magruder Corridor, officially Forest Road 468, follows the ridge between the Frank Church–River of No Return Wilderness to the south and the Selway-Bitterroot Wilderness to the north — the largest roadless area complex in the contiguous United States. Named after Lloyd Magruder, a packer murdered on this very trail in 1863, the route runs from Red River in Idaho’s Salmon River Mountains west to Elk City, crossing multiple high passes including Magruder Saddle at around 8,300 feet. The views from the ridgeline into the Selway River drainages below are the kind that stop you mid-sentence. Expect narrow shelf roads, unprotected drop-offs, creek crossings, and downed timber earlier in the season.
This is a genuine backcountry road — not a trail for the timid or for wide rigs. Maximum vehicle width is 79 inches, strictly enforced by physical terrain if not signage. A stock 4WD with high clearance handles most of it in dry conditions; add a locker if you’re going early-season when afternoon thunderstorms can turn clay sections into ice rinks. The road is typically open mid-July through September, sometimes later. No cell service, no fuel, no help. Carry a spare, recovery gear, and enough food for an extra two days. The Salmon-Challis and Nez Perce-Clearwater National Forests jointly manage the corridor — check road status with the Darby Ranger District before departure.
Trail Specs
| Difficulty | Difficult |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, Historic, Remote, Scenic |
| Length (miles) | 101 mi / 163 km |
| Duration | 2-3 days |
| Max elevation (ft) | 8320 ft |
| Best season | July-September |
| Minimum vehicle | 4WD high-clearance, max 79" wide |
| Nearest town | Darby, Montana |
| Land manager | Nez Perce-Clearwater & Salmon-Challis National Forests |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | USFS Magruder Corridor page Darby Ranger District contact |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
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Location
Trail Conditions
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Frequently asked questions
What's the minimum rig that can handle the Magruder Corridor?
You need 4WD high-clearance and your vehicle cannot exceed 79 inches wide — that's a hard limit enforced by the road itself, not just a suggestion. A stock Tacoma or 4Runner will make it, but aired-down tires and a skid plate are smart given the rocks and embedded ledges on the divide sections. Trailers and wide-body rigs get turned around.
When does the Magruder Road actually open each year?
Typically late June to early July depending on snowpack, but July through September is the reliable window. Snow can close the road at the divide without warning even in August, and it usually closes for good by October. Check with the Darby Ranger District before you go — they track current conditions and the opening date shifts every year.
Do you need a permit to drive the Magruder Corridor?
No permit is required to drive the road. It passes through Nez Perce-Clearwater and Salmon-Challis National Forests, so standard dispersed camping rules apply — camp 200 feet from water, no fee, no reservation. Campfire restrictions can be in effect mid-summer; check current fire orders before you leave civilization.
What's the hardest section of the route and what makes it sketchy?
The ridge sections near the Selway-Bitterroot Wilderness divide are the crux — narrow shelf road, loose rock, and sheer dropoffs with no guardrails. Two-way traffic on those shelves is a white-knuckle negotiation since there's barely room for one rig. Add afternoon thunderstorms and wet clay surfaces and it gets serious fast.
How much fuel do I need and where's the last gas before committing to this route?
There is zero fuel on the corridor — 101 miles of nothing. Fill up in Darby, Montana on the east end or Elk City, Idaho on the west end before you enter. Carry a minimum 5-gallon jerry can; the slow speeds, steep grades, and 9,200 feet of cumulative gain will punish your fuel economy harder than highway math suggests.
Trail track
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