The West Frio River rises in northeastern Real County (at 30°00' N, 99°45' W) and flows nineteen miles roughly parallel to Farm Road 336 to join the East Frio River at U.S. Highway 83 in Leakey (at 29°44' N, 99°45' W). The Short Prong of the West Frio River rises in north central Real County (at 30°00' N, 99°49' W) and runs south for eight miles to join the West Frio River near Prade Ranch (at 29°54' N, 99°46' W). Other major tributaries include Long and Short Kent creeks and Cedar and South Cedar creeks. West Frio River is dammed in its upper reaches. It flows from an area of resistant ledges and low cuestas surfaced by shallow, stony soils that support live oak, juniper, and grasses into flat terrain surfaced by clay and sandy loam that supports water-tolerant hardwoods, conifers, and grasses.