West of Ipswich, the 2,400 acre Willowdale State Forest has 40 miles of trails open to mountain biking, hiking and horseback riding trails through forest. The main routes are blazed in red and blue - the combined red/blue route is a 7 mile loop. The trails wind through dense maple and oak forest.
To reach the southern trailhead from Boston, follow US1 north to Topsfield. Turn right heading east on Ipswich Road for 1.8 miles to roadside parking area at a trail crossing. Trails into the state forest are on the north side of the road. Trails into the Bradley Palmer State Park are on the south side of the road. There is an alternate northern parking area off Linebrook Road.
Overall, Willowdale State Forest is the 15th most popular mountain bike trail of all 35 mountain biking rides in Massachusetts.