Highland park is west of Atlanta. About 30 miles north of Bremen. They have three motocross tracks. They are decent, but they don't compare to the tracks up here. The trail riding here is really good. Much better than Durhamtown. All the trails are one-way and marked per skill level. If you like to trail ride, you definitely need to check it out. They also offer rental bikes, cabins, showers, and have a KTM dealership on-site.
Website is highlandparkresort.com