Salt Lick is a place I had never ridden before. Although its only 1.5 miles to the wilderness boundary there is lots of fine singletrack in this area. I even found an aqueduct. Looks like you can connect with the Frisco exit.
I-70 west of Denver to Silverthorne exit #205 north on hwy 9 to first stoplight left on Wildernest Rd. drive to Salt Lick Trailhead about a mile on the left
http://www.singletracks.com/item.php?c=1&i=2222