Some single, some doubletrack. Not too much climbing and nothing technical at all, but makes a great night ride.
From Broadway & Baseline in Boulder, travel south on Hghwy 93 towards Golden. After 4 miles you will turn left and park at the lot just to the east of 93. The trail head is at the corner of 93 and 170 (Eldorado Springs Drive/Marshall Mesa Drive).
http://www.singletracks.com/item.php?c=1&i=1559