From Interstate Route 495 take Exit 89C on to the Lowell Connector. From Route 3 take Exit 80A if traveling southbound, Exit 80B if traveling northbound. . Take the Lowell Connector to Exit 5B (Thorndike Street) . Continue right on to Thorndike Street, which becomes Dutton Street . At the third traffic light continue straight under the overpass . At the next light turn right. Free parking is available at the City garage. Follow signs and walk through the mill courtyard to reach the Visitor Center