Big Bend Ranch State Park
is located to the west of Big Bend National Park. Over 299,008.38 acres of Chihuahuan Desert wilderness, extends along the Rio Grande from near Lajitas to southeast of Presidio 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. The Barton Warnock Environmental Education Center
in Lajitas serves as the eastern gateway to the state park; the western gateway is Fort Leaton State Historic Site
, just outside of Presidio.