The Trans - Pecos Natural Region has less than 12 inches (300 mm) annual rainfall. The most complex Natural Region, it includes Sand Hills, the Stockton Plateau, desert valleys, wooded mountain slopes and desert grasslands. The Basin and Range Province is in West Texas, west of the Pecos River, beginning with the Davis Mountains on the east and the Rio Grande to its west and south. The Trans - Pecos region is the only part of Texas regarded as mountainous and includes seven named peaks in elevation greater than 8,000 feet (2,400 m). This region includes sand hills, desert valleys, wooded mountain slopes and desert grasslands. The vegetation diversity includes at least 268 grass species and 447 species of woody plants. National Parks include the Amistad National Recreation Area, Big Bend National Park, Chamizal National Memorial, Fort Davis National Historic Site, Guadalupe Mountains National Park, and the Rio Grande Wild and Scenic River. This area is part of the Chihuahuan Desert.
which region in texas has the highest elevation
The Trans - Pecos region