Big Bend Ranch State Park, over 279,640.58 acres of Chihuahuan Desert wilderness, extends along the Rio Grande from southeast of Presidio to near Lajitas in both Brewster and Presidio counties. It was purchased from private owners in 1988. 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. Big Bend Ranch State Park is home for a tremendous diversity of animal and plant species, including 14 species of bats, several species of hummingbirds, and at least 11 other rare plants and animals, including Hinckley oaks and mountain lions. The park also maintains a small Texas longhorn herd, a remnant of the property's ranching heritage (not a part of the official Texas longhorn herd based at Fort Griffin).

• Hike this remote and rugged terrain and discover treasures of ancient extinct volcanoes, precipitous canyons, and waterfalls.