A wild, remote haven for hikers, backpackers, mountain bikers, Big Bend Ranch State Park has water sources in the middle of the Chihuahuan Desert. Take a birding, rock art, or geology expedition in this park along the Rio Grande at the southern edge of the Texas Mountain Trail region.
A slideshow of images taken along the road to historic Sauceda ranch in Big Bend Ranch State Park is here.
Here's a link to TPWD's webpage on Big Bend Ranch State Park. A quote: "Big Bend Ranch State Park, the largest state park in Texas, over 300,000 acres of Chihuahuan Desert wilderness in a remarkably rugged, remote and unpopulated setting. The park extends along the Rio Grande from southeast of Presidio to near Lajitas in both Brewster and Presidio Counties. Embracing some of the most remote and rugged terrain in the Southwest, it encompasses two mountain ranges containing ancient extinct volcanoes, precipitous canyons, and waterfalls. The area has been a crossroads of human activities for over 11,000 years, as diverse people and cultures have been drawn by the abundant resources of the Rio Grande/Rio Bravo corridor."