| Sulphur River | |
| Pushpin Map: | Arkansas |
| Pushpin Map Caption: | Location of mouth |
| Source1 Location: | Confluence of north and south forks at |
| Source1 Coordinates: | 33.3933°N -95.3556°W |
| Mouth Location: | Red River at |
| Mouth Coordinates: | 33.0935°N -93.8616°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | States |
| Subdivision Name2: | Texas, Arkansas |
| Source1 Elevation: | 101m (331feet) |
| Mouth Elevation: | 58m (190feet) |
The Sulphur River is a 175adj=midNaNadj=mid[1] river in northeast Texas and southwest Arkansas in the United States. It is a tributary of the Red River.
The Sulphur River begins at the confluence of its north and south forks forming (following earlier meanders) the northern and southern boundaries of, and meeting at the eastern end of, Delta County (Texas).[2] This is about northeast of the town of Sulphur Bluff, northeast of Dallas, and downstream (air miles) along the south fork from the Cooper Lake dam.
The river flows generally eastward through several Texas counties. Tributaries include Shawnee Creek and Brevelle Lake. The river provides most of the water for Wright Patman Lake, on the border between Bowie and Cass counties. Below Wright Patman Dam, the river continues its generally eastward flow to the Arkansas state line. The river flows southeastward through Miller County in southwestern Arkansas for until it joins the southbound Red River east of Doddridge, a few miles north of the Louisiana border.
The Sulphur River provides numerous opportunities for fishing, boating, and other activities.
Above Wright Patman Lake, the river has enough water for recreation most of the time. The flow is slow, and the river is murky, largely due to channelization upstream. Below Wright Patman Dam, the river flow depends on the amount of water being released from the dam; however, water quality is usually good.
Wright Patman Lake provides additional opportunities for camping, boating, swimming, and fishing.[3]