Lumberjack Trails is a 10 mile loop trail located near Boulder Junction, Wisconsin. The trail is rated as moderate and primarily used for mountain biking.
It's a good thing that this trail is used for primarily mountain biking, because if you're moving slow enough, you'll get eaten alive by flies. Horse flies. Deer flies. You name it, it was there, and trying to attack your face. It was not a fun hike, although it was a nice area. I plan to go back some day and give it another try.