Here are some links: http://home.att.net/~mark.livingood/bikerides.html

For those in the Atlanta area or travelling to it, you may want to surf over to the Southern Bicycle League's Website at: http://www.bikesbl.org There is a plethora of information available there on weekly organized rides, downloadable ride maps/cue sheets, links to other resources and a several discussion forums.

For off-road riding, go to: http://www.sorba.org the Website of the Southern Off-Road Bicycle Organization.

In general, there are some nice rides through Buckhead (residential) on the North side of town that cross back and forth over the perimeter (I285) and Atlanta's autoban (SR400). However, the best riding can be found outside the perimeter. There is a rails to trails project called the Silver Comet Trail that can also be accessed from town by using the Georgia PATH system, although I recommend staying on the road and paralleling the PATH until you get to the Trail. The Silver Comet is a mixed use trail that can be congested close-in to the I285 starting point. The further West you go the less crowded it becomes.

For true off-road, single track there are also come close-in options. On the East side of town is the "Yellow River Recreation Area" which includes two 5mi loops of hiking/biking/equestrian trails. The River trail is relatively easy but can be made "fun" and or more challenging by cranking up the speed. My wife likens it to a roller coaster ride -- noting that we ride a full suspension, off-road tandem mountain bike. The Creekside trail is a bit more challenging with longer climbs and more technical sections. It's been raining here for several days so the trails may or may not be useable. Also not too far away is Blankets Creek in Woodstock, GA; about 30 minutes from downtown (going against traffic). It's been nicknamed by some as "Tsali-South". Although not nearly as long as Tsali's trails, the terrain once you get to the real trail via the sloppy forest service road is really quite nice.

Just some thoughts.