Rocky singltrack that follows Rock Creek drainage. It is remote, and can be dangerous in some sections; don't ride alone. Trail can be wet in early summer. Rocks, and a few talus slopes and fallen trees. Those not in great shape may wisely choose to shuttle or ride road up to upper trailhead and ride the trail downhill. Very remote and not used or maintained much, but very scenic.
Take I-80 about 45 miles west out of Laramie to Arlington exit. Go under the overpass and take the first right onto a dirt road. Take the second left and follow up to the lower trailhead, or beyond up to the upper trailhead at Deep Creek campground.
http://www.singletracks.com/item.php?c=1&i=1584