The term "endless rolling hills" define the area around White Georgia and the Loves Bridge route is just an example of what's available. This 51 mile paved route starts at Sosebee Cycling Park. On a Saturday morning, if the weather is nice, you might find a dozen groups here, getting ready to clip in.
The adventurous 48 mile mixed-surface Talona Creek route is centered around the self-procliamed "MTB Capital of Georgia." Elijay is more accessible to Atlanta than the far northern mountains and this route includes a little bit of everything, from bucolic country roads past orchards and wineries to gnarly and nearly off the grid gravel and even a bit of seldom used singletrack to keep things spicy.
The Braswell Mountain Metric is a classic 100 km road route west from the Atlanta suburbs into rural Paulding County with one major climb over Braswell Mountain. The return east uses the most interesting section of the Silver Comet Trail including the 800 foot long tunnel under Brushy Mountain and the 750 foot long trestle over Pumpkinvine Creek.