Alamo de Cesario Creek rises just south of Bandera Mesa in eastern Presidio County (at 29°33' N, 103°50' W) and runs east for fourteen miles to its mouth on Terlingua Creek, north of Agua Fria Mountain in western Brewster County (at 29°34' N, 103°46' W). The surrounding desert mountain terrain, canyonland of volcanic rock, and moderate to high slopes of clay and limestone are surfaced by generally light reddish-brown to brown sand, clay loam, and rough stony soils that support sparse grasses, cacti, scrubby desert conifers, and oaks. The creek's name comes from a legend about a Mexican girl named Cesaria, who was captured by Mescalero Apaches and taken to their camp at Agua Fria. There they tied her to an alamo, or cottonwood, tree. Friends and relatives of Cesaria followed the trail of her captors and rescued her, but the tree and the area became known as Alamo de Cesaria, or Cesaria's Cottonwood.