Fantastic ride you can get to from downtown CB. Little bit of climbing when you first hit the Upper Loop on some nice singletrack, then it's some fast and fun downhill (singletrack) that gets moving pretty quick, right at the base of Mt. Crested Butte. You'll come up to a point where you can take a right on Tony's Trail and head back into town, or you can keep going a bit and then bang a left and take the Upper Upper Loop. Upper Upper is super cool/fun, climbing through an aspen grove the whole time pretty much on real nice singletrack. There's a few mildly technical spots, but nothing too challenging. A good change of pace from the fast singletrack. After a while you'll come to the Whetstone Vista trail, which is a real fun, rocky singletrack trail that brings you down to some road. Whetstone is very east-coast-ish in terms of its rocky-ness, and tons of fun because of it. That will bring you down to a road you can take back into town (and a bike path too). You can keep going straight instead of going down Whetstone, but I didn't do it so I couldn't tell you. Another way that would be killer fun is to just turn around and ride the Upper Upper back the way you came, would be ridiculous fun downhill through the aspen grove, and you can get back into town that way without having to ride on the road (like you do if you take Whetstone). Highly recommend riding this trail, lots of fun, easy to get to.