I am new to the area, but the route that I have learned is: Start up the gravel access road "House of dreams" it's a good 3.5 mile climb up to the house of dreams, nothing techincal, just good old fire road climbing. Once you get to the house of dreams, follow around to the side of the lookout tower and you will see the "Bike Trail" sign, dip into that trail for a nice singletrack that follows the ridgeline for a couple of miles back down to another fire road, it's a nice little trail with some good flow for this area. Once you get to the fire road you have many options; you can cross the road and ride "tight-rope" which takes you down to another fire road along a resevoir and then back up hill to the house of dreams fire road, or you can go left (instead of tight rope) and take any number of singltracks down the hill and end up back on the main road back to your car, or you can take the fire road (where you ran into tight rope) left all the way back to the main fire road, go back up to House of dreams and come back down the singletrack. If I've confused you, drop in on one of the bike shops in Rome and they can hand draw you a map like they did for me. (So far I know of no published trail maps for these trails, but most of them are well ridden). I usually ride about 10-12 miles back there which comes out about half and half singletrack vs gravel/fire road.
From Rome, take Hwy 27 (Martha Berry Hwy), Turn Left into Berry College. Go through gate and all the way back to the Mountain Campus (Wynnshape). Follow the road to the right, pass the swann ponds, theres is a big Chaple on rt., park in that parking lot (buy the fire road). Take the main road up the hill until you come up to a gated gravel road that has a sign for "House of Dreams". That Gravel road is the One of the trail head.
http://www.singletracks.com/item.php?c=1&i=1821