The Trails at The Beach were created by the Southside Mountain Bike Association led by Jim Huff and Terry Tuck. In less that one year, eight miles of single/double track trails have been installed. These trails are well-maintained. The trails are rated by color-trail signs. These trails have something for every different skill-level mountain biker. You can access a map of these trails by clicking on http://www.geocities.com/Yosemite/Trails/7930
"From Atlanta: Take I-75 South to Exit 75 (Highway 138), turn right (west), go two miles to red light, turn left into Clayton County International Park, go .4 mile to bike trails parking sign, turn right into gravel parking lot. There is a trailmap at the trailhead.
http://www.singletracks.com/item.php?c=1&i=556