One of the best routes here is to go to the right of the pond and take a right. In about 60 yards turn left on Rockhouse Trail. Follow Rockhouse past a few trails. Be sure to take a left across the bridge where you see Cucumbertree Trail. Follow till you come to White Oak Connector and take it. It will climb up below a rock face to the top of the ridge and Athens Trail.
Here is where you can make some decisions. You can take a right and ride all the way out Athens Trail which comes out not too far from the end of E. State Street or you can still take a right and ride a short distance and at the top of a steep little climb go left on Finger Rock Trail which is actuall in Strouds Run State Park and ride it down to Dow Lake in Strouds Run.
Or you can take a left and enjoy the Athens trail back down to the parking area. There are a couple other trails that run up and down the hill connecting Athens trail to Rockhouse Trail. You can get a map online at Athens Bike Clubs website under suggested rides. I'll try to gps some of these next time I'm over there.