The West Fork of the Paradox trail has some of the best singletrack and views available on the Uncompahgre Plateau. It would be much more popular if it weren't for a very steep/loose section mid-trail and the level of commitment it takes to ride it.
The trail can be ridden either way, but the steep/loose section is easier to hike down than up. Also, riding up the trail from Spring Creek makes little sense.
Start from the Old Paradox Road high on the Plateau off of Divide Road. Park about 1/4 mile west of the start to Spring Creek and then head north on a rough road. Take the road for a couple of miles until you see the trail signs for Dry Creek on the left and Paradox on the right (as of 7/2014 the Paradox sign was missing the name).
From here the trail mostly descends, but be prepared for some short climbs. There are some great Aspen groves and views to the northeast.
Roughly halfway through the Paradox Trail is a very steep and loose section that is too sketchy for most to even ride down. This will take a few minutes to negotiate, but afterwards you have more fun singletrack and numerous aspen groves taking you back to the Upper Spring Creek Trail
After meeting the Upper Spring Creek Trail
you can take it back to Divide Road, follow it downhill to Dented Door, or keep going towards Lower Spring Creek.