Follow service road about 1/4 mile. Trail takes off to left. The trail follows the old Argentine Central railroad grade to the old townsie of Waldorf a ghost town now.From here you can take Argentine Pass to Montazuma ,or follow the railroad grade. It ends after afew miles.
Take I70 west of Denver to Silver Plume exit turn left go under overpass turn right on dirt service road and park.
http://www.singletracks.com/item.php?c=1&i=1345