Nugent MountainNugent Mountain is a summit in Brewster County, Texas, United States.DescriptionNugent Mountain is located in Big Bend National Park and the Chisos Mountains. The mountain is composed of intrusive igneous rock which formed during the Oligocene period. Although modest in elevation, topographic relief is significant as the summit rises 1,600 feet above the Rio Grande Village Road in. Based on the Köppen climate classification, Nugent Mountain is located in a hot arid climate zone with hot summers and mild winters. Any scant precipitation runoff from the mountain's slopes drains into the Rio Grande watershed. The mountain's toponym has been officially adopted by the United States Board on Geographic Names, and has been reported in publications as early as 1913.