See Banks & Eckardt, _Colorado Rivers & Creeks II_, which has a great picture of the runnable Crystal Mill Falls.
Lat/longitude coords of the putin and takeout are approximate, from TopoZone.
See also
Avalanche Creek to BRB Campground (Class III),
Penny Hot Springs to Avalanche Creek (Class IV+),
Redstone to Penny Hot Springs (Class V+),
Marble to Redstone (Class III-IV),
Crystal Gorge (Class V+),and
North Fork Crystal (Class V+).