This network can be worked in many combinations, but I suggest catching the singletrack that swings SW around the nearest hill. Follow this around and pick up any one of the trails it branches into. Watch out for trailrunners and fellow bikers, some sharp turns can lead to disaster at high speeds. This trail can also be reached from the trailhead on Menaul.
From I-40, head north until Indian School. East on Indian School towards the mountains. This road will dead end in a trailhead parking lot. From here, find a starting spot east of the parking lot and get riding!
http://www.singletracks.com/item.php?c=1&i=1867