The Devils River is a pristine, whitewater river in southwestern Texas, USA. From its headwaters (30°20' N, 100°57' W) in northwest Sutton County, it flows southwest for 94 miles (151 km) through Val Verde County and empties into the northeastern shore (29°28' N, 101°04' W) of the Amistad Reservoir in Del Rio, Texas on the Texas/Mexico border.