Length: About 450 miles.
When to go: Best from late February through May, October through December.
Nearby airports: Midland (225 miles); El Paso (325 miles); San Antonio (400 miles).
Lodging: Gage Hotel, Marathon; Chisos Mountains Lodge, Big Bend National Park (three-month advance reservations required).
Supplies: Available at Chisos Basin.
Words to the wise: When hiking, wear cool, rugged clothing for protection from prickly plants and take along at least one gallon of water per person per day.
Vehicles: On dirt roads, high-clearance vehicles are necessary to avoid large rocks.
Fuel: Panther Junction, Rio Grande Village.
Nearby attraction: Museum of the Big Bend, Sul Ross State University, Alpine.
Visitor centers: Persimmon Gap, Panther Junction, Rio Grande Village, Chisos Basin.
Further information: Big Bend National Park, P.O. Box 129, TX 79834; tel. 432-477-2251, www.nps.gov/bibe.
Brewster County Tourism Council, P.O. Box 335, Terlingua, TX 79852; tel. 877-244-2363, www.visitbigbend.com.