Big Bend Ranch State Park 
River Rd.
Presidio, TX 79845
432-358-4444
http://tpwd.texas.gov/state-parks/big-bend-ranch
State Park: Bike, Birding, Camp, Fish, Hike, Picnic, Walk, Water Sports
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.