This park has everything. It is rated for everyone from beginner to expert, which is why I marked everything as a 5 since anything can apply. Most of it is singletrack, but there is a little bit of doubletrack in there too. The guys that maintain the trail ask that you *do not ride if the trail is muddy*!!!! It is maintained by volunteers and is always changing.
From I-70, head north on MO-7, then take Truman Road 2 miles west. Follow the signs for the "Lake City Range", which is the shooting range. The shooting range butts up against the bike trails, but don't freak out - you are not going to get shot.
http://www.singletracks.com/item.php?c=1&i=1019