This route runs from Marble to Crested Butte over Schofield Pass. The Crystal Mill, on the western side, draws tourists by the thousands. The mill is one of the most photographed structures in Colorado. The big draw for 4-wheelers, however, is the trip through Crystal Canyon, featuring spectacular Devil’s Punchbowl, a deep pool of water below a dramatic waterfall. Scenery along the entire trip is unsurpassed. Many historical features. Fishing is popular along the river.