Meramec State Park is about 90 minutes from downtown and offers a multitude of good trail runs of varying lengths as well as a great 9 mile loop, The Wilderness Trail, complete with eight backcountry sites located along it for those wishing to camp out in the woods. Trail runners will enjoy rocky single track that meanders its way through the woods to remote sections of the park. There are several shorter trails, too, if you're not feeling up for the 9-miler. The park is easy to get to via some rural highways. Directions can be found on the park's website: http://mostateparks.com/park/meramec-state-park Click on the hiking icon for trail details.