There are two reasons why Colonel Denning State Park offers some of the best hiking trails in Pennsylvania. The first has to do with the eighteen miles of trails contained within the actual park itself, the beautiful routes that lead your through the trees by the moving water. These are a great hike for beginners and experts alike, depending on which area you start at (pick up a trail map at the park office). The second has to do with the Flat Rock Trail, which, though short (two and a half miles) leads you up to one of the most breath taking views in the state on top of Flat Rock. Whether you're an avid hiker or not, if you're looking for a great weekend activity, we strongly recommend the Flat Rock trail.