Trail network. Apparently better riding trails are clustered in south section of area.
From 290, take exit 24. Head north off highway and take your first right, just before the Davidian Farmstand. Follow this road, think it's Ball St, (it twists a bit) for a couple miles. At end turn left onto Green St. Take next right onto Smith Rd, parking is about 1/4 mile down on right.
http://www.singletracks.com/item.php?c=1&i=4553