Getting Oriented
River Road runs along the southern edge of Big Bend National Park in Brewster County, paralleling the Rio Grande for the full 51 miles. Castolon Historic District anchors the western end with limited services and the closest fuel to the road's middle section. Rio Grande Village on the eastern end has a campground, gas, and a small store. Panther Junction Visitor Center sits in the center of the park; permits for River Road campsites must be picked up there.
Trail Overview
From Castolon, the road runs east through the Castolon Cottonwoods, drops into the Smoky Creek drainage, and continues along the river past Mariscal Mine ruins. The middle section crosses the Mariscal Canyon area, with side spurs leading down to the river. The east section approaches Rio Grande Village along somewhat better-maintained gravel.
Driving the full 51 miles takes 6 to 8 hours without stops; with backcountry campsite stops, plan two days. The east half handles a high-clearance SUV; the west half needs 4WD low range and skid plates for several rocky climbs.
Points of Interest
- Castolon Historic District. Western trailhead, with the Castolon Cottonwoods and an interpretive site at the historic ranger station.
- Mariscal Mine. Ruins of a 1900s mercury mine. Federally protected; do not enter shafts.
- Mariscal Canyon. Where the Rio Grande cuts a narrow canyon visible from spur roads.
- Talley Camp. Primitive campsite with river access.
- Black Dike. A volcanic intrusion crossing the road, visible on the Mexican side as well.
- Rio Grande Village. Eastern trailhead, with a fee campground, fuel, and a small store.
Where to Camp
Multiple primitive roadside campsites along River Road, including Talley, Black Dike, Mariscal, Buenos Aires, La Clocha, and others. Each requires a backcountry permit ($10/night) from Panther Junction Visitor Center. Walk-up only; no advance reservations. Sites have fire pits but no toilets or water.
Tips for a Safe and Enjoyable Trip
- Visit October through April. The Rio Grande corridor runs hotter than the Chisos rim — summer temperatures top 115°F.
- Reserve campsite permits in person at Panther Junction Visitor Center.
- Carry full water (one gallon per person per day plus emergency reserve).
- Carry recovery gear and a full-size spare. Tire damage is common.
- Cell coverage is absent. Carry a satellite messenger.
- Travel in two or more vehicles. Recovery from a single-vehicle breakdown is days.
- Stay clear of the Rio Grande's bank in flood — the river can rise quickly with upstream rain in Mexico.
- Park admission required (Big Bend NP entry fee).
- Do not cross the international border. Boquillas Crossing has specific entry rules.
- Contact Big Bend National Park at 432-477-2251 for current conditions.
