The Alcovy River rises in eastern Gwinnett County, 5 miles (8 km) northeast of Lawrenceville, and flows generally south through Walton, Newton and Jasper counties. It defines portions of the boundary between Newton and Jasper counties. It joins the Yellow River and South River to form the Ocmulgee River at Lake Jackson, a reservoir formed by a dam on the Ocmulgee. North of I-20, the Alcovy River becomes a lowland swamp for about 4 miles (6 km) before resuming the nature of a Piedmont stream. The lowland area contains an ecological rarity: the tupelo gum tree.
^U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived 2012-03-29 at the Wayback Machine, accessed April 21, 2011