From Route 3, take the Route 3A S exit toward in Hudson toward Tyngsborough, Mass. Turn left onto Dracut Road, follow for 2 miles. Turn left onto Sherburne Road; follow to the end and turn left onto NH 128 (Mammoth Road). Bear right onto Route 111A (Marsh Road). At the traffic circle, take the second exit onto 111A and stay straight for approximately 1 mile to the Landmark Estates entrance on left.