Rode the Fried Green 50 out of Juliette, GA a couple of weeks ago. This is a free event, and not a race -- just a ride with a bunch of folks in the Piedmont National Wildlife Refuge. About 100 people showed up for the 45 mile loop, which includes maybe 5 miles of pavement and the rest gravel. I was in the neighborhood again yesterday, so I rode most of it again, stopping for pictures this time. First one is from the event. The rest are from yesterday.
If anyone is down that way (near Macon), this is well worth your time. There's a gps track on the website posted above I think. Part of the full route is hiking only, but if you ride everything ccw and skip the last loop you miss that part. Just make it a lollipop.
I would say + 1 on Wooglin's statement of well worth your time to explore the FG50 route. I've not ridden the event, but I make an 1 1/2 hr drive when visiting relatives in The ATL for a change of scenery and to explore the area. For reference I use a USFS map "Oconee National Forest" (has a bald eagle on cover) that I purchased online. It covers WMAs from Eatonton to west of Monticello, and from Gray to just south of Madison. Beaucoup miles of gravel and red clay, chip seal and smooth paved secondarys with light traffic and rural scenery. Very much like the area from LCHT down to Hickory Knob, and Modoc.
There's even about 35 miles of single track called "Ocmulgee Bluff Horse Trails". Not as well maintained as CSRA folks are used to, but Turkey, Wine, and Stevens-esque along the Ocmulgee river.