To get to the starting area, take I-70 West Bound to the Dillon/Silverthorn Exit (Hwy 6), turn left off of the exit and follow Hwy 6 for approximately 3.4 miles.  Shortly after you pass Lake Dillon, you will spot a parking lot for the bike path on the right side of the road (keep your eyes open, this may be hard to see).  If you get to Swan Mountain Road, you have gone about 1 mile too far.