Pick up a copy of "Mountain Biking in Georgia" by Alex Nutt, and/or "Off The Beaten Track-Vol. III, North Georgia" by Jim Parham at a local bike shop, or at Barnes&Noble or Borders, etc.
Watch for rides here, and post when and where you want to go.
Check the "Trails" section and the "Rides" section of this Forum frequently, to see "what is, what was, and what will be". Most of the local bike shops can put you on to rides, and we are always posting new rides.
Always check the Home Page here, and the menu areas to the left.
Popular Greater Atlanta trails include Blankets Creek, Big Creek, Central Park, and for "riding off-road on a road" (converted railine)...the Silver Comet trail. Further from the city you have Chicopee Woods and Tumbling Creek near Gainesville, Ga., as well as the 1996 Olympic trail at the Ga. Internation Horse Park near Conyers, Ga.
Many more mountainous and challenging trails are found both north and south of Atlanta, when you can make a day of travel and riding.
Trail maps can be found under the trails section here: http://www.rambo-mtb.org/
The secret to mountain biking is pretty simple. The slower you go, the more likely you'll crash / JULIE FURTADO
If you ain't crashin, you ain't ridin / ANONYMOUS