Near Terlingua and adjacent to Big Bend National Park, the Lajitas Trail System rolls along private land near the Lajitas Resort. There is a 15 mile singletrack loop through desert. There is also plenty doubletrack providing access to another 30 miles of trails.
To reach mountain biking at the Lajitas Trail System trailhead from Terlingua, follow Ranch Road 170 towards Rio Grande for about 3 miles. About halfway to Rio Grande, look for the airport signs on the south side of the road and park here.
Overall, Lajitas Trail System is the 51st most popular mountain bike trail of all 59 mountain biking rides in Texas.