i'm not for sure about clay city i don't know where it is at but i have a good place to ride that is local,just everybody i ride with has utility bikes and there pretty slow.I'm in e-town about an hour from you.There is also a place called royal trails about 30mins from me that you can pay and ride.
Google "red bird district national forest" for some great trail riding in southeast kentucky. Ive ridden this 3 times and it's great fun. Do not believe the 65 mile loop, we,ve never finished it due to gas issue's. They ran a national enduro on this system a few years back and some areas are quite difficult