Start on the pavement at the first gated road. You will pass a picnic shelter and volleyball court. Continue around the next gated road onto the gravel. The right fork leads to some washed out doubletrack and a lot of uphills if you can find your way to the singletrack. The left fork on the gravel road goes up up up, but there is a motherload of trails up here going every which direction. One can easily get lost out here but thats just part of the fun.
From Atlanta, 45 miles north on I-75 to Exit 290, east on GA 20, south on GA 20 Spur to the dam and visitor center.
http://www.singletracks.com/item.php?c=1&i=553