Half of the trail is fast and moderately hilly. The other half is tight/winding single track. Bike trail is closed from December 15 through April 15 and signs claim the park closes at dusk. This 4 mile loop is a great place to practice your spinning, not to mention your technical skills on sudden, short climbs and winding singletrack.
From I-275 exit 8 Mile Road, head five miles west on 8 Mile Road, turn left on Beck Road. You will see the entrance on your right. Park to the left of the horse staging area. Follow wide gravel road for a half mile south. The posted start of the mountain bike trail will be on your left.
http://www.singletracks.com/item.php?c=1&i=265