This is about a 4 mile trail that circles Yahoola Creek Reservoir but also swerves back into the woods a ways. This trail is surprisingly tough with many short, steep climbs in the back hills. While this is a wide doubletrack trail that isn't always very entertaining, this trail is right on the edge of town and is very easy-to-access. It's great for a short after work hike or trail run without having to drive all the way up to the Appalachian Trail.
Head out of Dahlonega north past the Walmart on the "bypass." Go straight through the stop light at the entrance to Walmart, and straight through the stoplight at the junction with 52. Shortly after the second light, hang a right into the small gravel parking area overlooking the dam.
http://www.tripleblaze.com/trail.php?c=3&i=1334