Mill D South Fork
Mill D South Fork "trail" is actually an old mining road heading up to the Cardiff Mine. It is pretty much one gut-busting climb to the top! You will need lungs of leather and legs of steel to climb all the way to the top! The "trail" is like riding up a dry stream bed. But the beauty of the area and the feeling of solitude (because it is such a hard climb most people avoid it) make this a great ride. The old mining buildings at the top are very picturesque.
How to get there: From I-215, take Exit 6 (look for the signs for the ski areas). Head east to Wasatch Boulevard. At the second light, turn left up Big Cottonwood Canyon. The trailhead is about 10 miles up the canyon. There will be signs for Doughnut Falls. Park off the road (the road widens with parking areas on both sides).
Length: 5 miles out and back
Click here for a Topo: 
Click on the thumbnails to get a larger version:
Looking
back down on the trail.
One
of many old mining buildings left at Cardiff Mine.
Waterfall
markes the end of the trail!!
Reed
and Benson Ridge
To go back, click on me!