SULPHUR RIVER. The Sulphur River rises at the junction of the North Sulphur and South Sulphur rivers, two miles south of Cunningham at the Lamar-Delta county line (at 33°23' N, 95°21' W). The river, which serves as the county line of a number of Northeast Texas counties, enters Delta County just east of its origin and exits that county 3½ miles southeast of Cunningham. In its middle reaches, the river flows into Wright Patman Lake five miles northeast of Coopers Chapel in Titus County and just below the lake enters Lake Texarkana five miles southwest of Bassett. Dammed six miles southeast of Redwater, the river serves as the lake's main water supply. After exiting Lake Texarkana at its dam, the Sulphur River continues east, entering Arkansas four miles east of Domino. In Arkansas it flows east for fifteen miles to its mouth on the Red River, two miles northeast of Doddridge in southern Miller County, Arkansas (at 33°06' N, 93°52' W). The river flows 183 miles. The generally flat terrain along the stream is surfaced by clay and sandy loams that support water-tolerant hardwoods, conifers, and various grasses. With the construction of Wright Patman Lake and Lake Texarkana, the river took on a recreational function. Among the tributaries that empty into the Sulphur River are Mustang Creek, Whiteoak Creek, Calvert Creek, and Crutchers Creek.