Devils Draw (also known as Devils River Canyon), a valley with an intermittent stream, begins in northern Val Verde County (at 30°14' N, 101°20' W) and runs southwest for fifteen miles to a point on Howard Draw, four miles east of the Pecos River (at 30°12' N, 101°33' W). Devils Draw is met by seven small tributaries-Flat Rock Draw, Mills Draw, Live Oak Draw, Divide Well Draw, New Well Canyon, Will Davis Canyon, and John Davis Canyon. The path of Devils Draw sharply dissects massive limestone that underlies flat terrain, forming a rugged and winding valley. Wash deposits of sand, gravel, and mud cover its floor. Soils of the area are generally dark, calcareous stony clays and clay loams that support oaks, junipers, grasses, and mesquites. The name of the draw reflects the interest early settlers of the area had for devil folklore. Gaspar Castaño de Sosa may have traversed Devils Draw in August 1590.