The singletrack climbs Badger Mountain, approximately 800 ft gain in about 1-1/2 miles. The trail continues down the back side to Dallas Road (the other trailhead). The trail is intersected by access roads (there are cell towers at the top of the mountain) and the roads are a nice change of pace and steeper than the trails. MTBs must share the trail with hikers, though there is a hiker-only trail on the north face.
From I-182 Queensgate exit, south on Queensgate to Keene. Turn left onto Keene for ~3/4 mi. Turn right onto Brantingham and another almost immeidate right onto Westcliffe. Up the hill on Westcliffe until it T-s, then left onto Meadow Hills. After 1/8 mi, turn right onto Summit. The trailhead is at the top of Summit (by the water tanks).
http://www.singletracks.com/item.php?c=1&i=4313