Castlewood features 15 miles of hiking trails near St. Louis, MO.
Castlewood State Park (from their website). From I-270 take the Dougherty Ferry Road exit and travel west on Dougherty Ferry to Big Bend Road. Turn right onto Big Bend Road and travel west to Ries Road. Turn left onto Ries Road and continue until reaching the park entrance at the intersection of Kiefer Creek and Ries roads.
http://www.tripleblaze.com/trail.php?c=3&i=633