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Red River of the South
| States | Arkansas (156 mi), Louisiana (280 mi), Oklahoma (568 mi), Texas (622 mi) |
| Length | 1,004.2 miles |
| Watershed Length* | 26,212 miles |
| Mouth | Atchafalaya River ⤏ Gulf of Mexico |
| GNIS | 558728 |
Tributaries
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— Watercourse ‐ ‐ ‐ Watershed* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey