2016 Map of Castolon OE S

About this map

Big Bend National Park occupies the northern portion of this international border survey, where the winding course of the Rio Grande separates the United States of America from Estados Unidos Mexicanos. The map documents a sparse desert landscape defined by ephemeral drainage patterns and the rugged topography of southern Brewster Co, Texas. A primary point of access into this remote river corridor is marked by River Rd W, which follows the general contour of the valley north of the riverbank. This map provides a technical perspective of the international boundary line as it follows the deepest channel of the river, illustrating the topographical isolation of the terrain south of the border in Chihuahua, Mexico.