100+ miles across Big Bend National Park.
The route begins with 50-mile traverse of the 311,000 acre Big Bend Ranch State Park. Hikers cross the Mesa de Anguila and approach the Chisos from the West, concluding the trip on the South Rim, Texas' pride and joy. This route offers exceptional navigational challenges. Expect off-trail navigation hazards through rarely traveled remote sections of these parks.
Route breakdown: trail=49 mi, dirt road/4WD roads=29 mi, sandy arroyo=14 mi, off-trail route finding=5 mi, paved road=3 mi
Source (and further info): https://www.bigbend100.com/