Oklahoma is totally embraced within two large drainage basins—the Red River and the Arkansas River. These two rivers, and their many tributaries, flow into Oklahoma from all six of the state’s neighbors. However, all surface water leaves Oklahoma by way of the Red, Arkansas, and Little rivers and Lee Creek. Most rivers and tributaries flow generally to the east and southeast across the state. Among the special aspects of the state’s watercourses are its six state scenic rivers in the east and several natural salt plains and saline rivers in the west.
Oklahoma has approximately 78,603 miles of river, but no designated wild and scenic rivers.
Source: Oklahoma Historical Society