Desert and mountains are in Texas's Big Bend.
The Big Bend is a colloquial name of a geographic region in the western part of the state of Texas in the United States along the border with Mexico , roughly defined as the counties north of the prominent northward bend in the Rio Grande as it passes through the gap between the Chisos Mountains in Texas and the Sierra Madre Oriental in Mexico . The region is sparsely populated , arid , and rugged , containing the Chisos and the Davis Mountain ranges . Texas . Traveling from east to west , one can observe terrain that ranges from coastal swamps and piney woods , to rolling plains and rugged hills , and finally the desert and mountains of the Big Bend .