Here are a few in that area:

http://trail.motionbased.com/trail/activity/1678234

Oh! Here's the one I prefer: http://trail.motionbased.com/trail/activity/692750

There is just one stretch, about 1/4 mile on a busy road, but there's a shoulder, then a left - just be careful crossing. There are route markings for both routes - this one is a circle with an arrow in it, and you can cut off the upper loop to give you a 70-ish loop.

Do a search in Motionbased for Madison, Ga and Rutledge.