Back 40 Trail in its entirety is 22.2 miles, with an elevation gain (and loss) of 1,950 feet. The trail can be taken in either direction and is shared with mountain bikers. Hike the trail clockwise for steeper climbs and longer descents. The trail is open from 7 a.m. to 10 p.m., and during hunting season, the trail stays open, so wear orange or hi-vis yellow around that time.