Lonesome Highway — Centennial Road to Big Bend Basin via Persimmon Gap and the Dead Horse Mountains
Comanche country — 26 miles of Chihuahuan Desert solitude.
Persimmon Gap marks the northern entry to Big Bend National Park — a notch in the Dead Horse Mountains that Comanche raiders used for centuries on their raids into Mexico, and that smugglers used long after. The Old Ore Road, one of Big Bend’s most storied backcountry routes, drops south from near Persimmon Gap through Ernst Basin and the rugged Chihuahuan Desert floor for 26 miles to the Rio Grande Village area. Early miles pass through classic Big Bend desert: lechuguilla, ocotillo, sotol, and the eroded volcanic buttes that define the Dead Horse Mountains. Ernst Tinaja — a series of natural water tanks carved into volcanic rock — sits roughly midpoint and is the most reliable water source in the park interior. The road deteriorates significantly in its southern half, where loose gravel, embedded rock, and dry washes demand constant attention.
This is a moderate-to-difficult run depending on conditions and recent weather — Big Bend’s desert washes flash fast and leave deep sand and cobble in their wake. Minimum vehicle is a high-clearance 4WD with a skid plate setup; aired-down tires are standard practice. The National Park Service requires a backcountry permit for overnight camping along the route, available at the Panther Junction Visitor Center. Season is October through April — summer temperatures routinely exceed 110°F and make the run genuinely dangerous. Fuel at Study Butte or Marathon before entering. Satellite communicator is non-negotiable out here.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry, High Clearance, Overland Route |
| Surface | Dirt, Gravel, Rock, Sand |
| Features | Camping, Historic, Remote, Scenic, Water Crossings |
| Length (miles) | 26 mi / 41.8 km |
| Duration | 1-2 days |
| Max elevation (ft) | 3850 ft |
| Best season | October-April |
| Minimum vehicle | High-clearance 4WD with skid plates |
| Nearest town | Marathon, TX |
| Land manager | National Park Service — Big Bend National Park |
| Permit required | Yes |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | Big Bend Backcountry Roads (NPS) Big Bend Backcountry Permits |
| 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 without modifications?
A stock Tacoma or 4Runner with factory skid plates will manage most of it, but low-hanging bumpers and limited clearance will cause problems on the rockier sections through the Dead Horse Mountains. AT tires are strongly recommended — the sand and sharp Chihuahuan Desert rock will punish all-seasons. Lift helps but isn't mandatory if you're careful.
When is this trail actually open and drivable?
October through April is the window — summer heat in the Trans-Pecos is brutal and dangerous, with temps regularly exceeding 110°F and flash flood risk spiking. Spring rains can also close sections temporarily. Check current road conditions with Big Bend NPS before you leave Marathon.
Do you need a permit to run this route through Big Bend?
Yes — a backcountry permit is required from the National Park Service since part of this route passes through Big Bend National Park. Get it in person at the Panther Junction Visitor Center or call ahead. There's also a park entrance fee on top of the permit.
What's the hardest section and what makes it sketchy?
The Dead Horse Mountains stretch is where the trail gets honest — loose rock, off-camber lines, and some shelf road exposure with limited room to recover if you slide. Nothing that warrants a winch in dry conditions, but one wrong line on wet rock changes that equation fast.
How much water do I need to carry, and is there any reliable source on route?
Carry all of it — there are no reliable potable water sources on this 26-mile stretch, and the water crossings are not safe to drink from without serious treatment. Plan for at least 1 gallon per person per day minimum, more in warmer months, and top off in Marathon before you head south. There is zero cell service on this route if something goes wrong.
Trail track
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