Course
The Rough River rises in northwestern Hardin County and flows generally west-southwestwardly through or along the boundaries of Grayson, Breckinridge, Ohio and McLean counties, past the town of Hartford. It joins the Green River at the town of Livermore, on the common boundary of McLean and Ohio counties.
On the boundary of Breckinridge and Grayson counties, the Rough is dammed to form Rough River Lake. The lake collects the 29.5-mile-long (47.5 km) North Fork Rough River, which flows for its entire length in Breckinridge County.
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