The Little Pee Dee River is a 116-mile-long (187 km) tributary of the Pee Dee River (which originates in the Appalachian Mountains where it is known as the Yadkin River). The Little Pee Dee technically arises near Laurinburg, North Carolina as Gum Swamp, which flows southward, receiving several small tributaries, across the South Carolina border into Red Bluff Lake, near McColl, South Carolina.