3.5 miles out and 3.5 miles back, Snodgrass is a nice little trail that is super twisty through the trees, and just a fun ride. Nothing super technical... there are a couple of short, steep hills, but the dirt is so tacky they are completely doable.
Head north out of Crested Butte towards the resort, hang a left on Washington Gulch, and the trail starts a couple miles down on the right. Snodgrass runs between Washington Gulch and Gothic road, so you could start on either end, or loop it. If you are riding it as an out and back, park down on Washington so you can do most of the climbing at the beginning.
http://www.singletracks.com/item.php?c=1&i=2730