Kettle Moraine - John Muir Trail is a 7.9 mile trail located near Elkhorn, WI. The trail is primarily used for trail running.
Trail was nice. Dense forest. Trails are very well maintained as well as marked. Only down side is the large amount of mountain bikers on the trails. Must keep eyes forward at all times as they come up on you fast.
The trail wasn't marked well for hiking. We ended up getting lost and then because it wasn't marked well we ended up having to turn around because we weren't on the right path.