East or West: From Rt-2 take exit 113B (formerly exit 40B) towards I-495 North/Lowell. Continue on I-495 North to exit 80 (formerly exit 31) for Rt-119/Groton. Remain on Rt-119 to the traffic lights at the junction of Rte-225. Proceed straight for approximately 0.4 miles and take a left onto Robin Hill Road. The sanctuary parking area is located in 0.1 mile, just above the corner of Cardinal Lane. Look for the Mass Audubon Rocky Hill sign.
North or South: Take I-495 to exit 80 (formerly exit 31) for Rt-119/Groton. Remain on Rt-119 to the traffic lights at the junction of Rte-225. Proceed straight for approximately 0.4 miles and take a left onto Robin Hill Road. The sanctuary parking area is located in 0.1 mile, just above the corner of Cardinal Lane. Look for the Mass Audubon Rocky Hill sign.
Please note: The parking area is not plowed in winter.
Address: Groton, MA