If you go north of Roanoke on 311, there is the Bald Mountain road, I'll have to find the FS # for it. Its a nice ride but not very challenging. You can go left, off the top toward Oriskany and come up by Roaring Run Furnace for a bit of a hike and to splash in the water. There's a neat rockface/water slide near the top that is really fun.
When are you planning to be in the area?