Outside track is easy, relaxing. There are technical portions on the inner trails.
From rt 128, take exit 17 and follow the signs towards Wenham. After 1 Mile Take the right to follow Rt 22 towards Essex/Hamilton. After the farmstand, take the right onto Chebacco Rd. The Trailhead is on the right about 1.5 miles down.
http://www.singletracks.com/item.php?c=1&i=8980