The Rough River is a 136-mile-long (219 km)[1] tributary of the Green River in west-central Kentucky in the United States. It's located about 70 miles southwest of Louisville, and flows through Breckinridge, Hardin, Grayson, and Ohio counties. Via the Green and Ohio rivers, it is part of the watershed of the Mississippi River.[2] According to the Geographic Names Information System, it has also been known historically as "Rough Creek".[3] In the 1950s it was dammed, creating Rough River Lake.