The Red River of the South meanders 1,360 miles through Texas, Arkansas and Louisiana before empting into the Mississippi River. It forms the border between Texas and Oklahoma for significant distances.
The Red River has played key roles in Alexandria and Pineville through the decades, and centuries, through peaceful times and through the Civil War, through low stages of the river, and in floods like that shown below of the Murray Street Bridge.
A series of locks and dam built by the U.S. Army Corps of Engineers have made the Red River navigable through Alexandria.