The park, which is a 37-mile-long trail, is open to hikers, mountain bikers, joggers, roller bladers and (in some spots) equestrians. The trailheads are marked with the Centennial Trail logo.
Located along the Spokane River, between Nine Mile Falls, Wash., and the Idaho state border in Spokane County.
http://www.tripleblaze.com/trail.php?c=3&i=3726