This Forest, 20 miles north of Boston, has some really incredible mountain bike trails within its boundaries. There are a variety of trails from roads to paths to single track covering over 35 miles. Use the included track to guide you on a loop around the circumference of the main trails which passes by sevaral bodies of water where you can also watch for birds. There are plenty of trails that twist in and out of the track I have, too many to make turn for turn directions. Use the track and your phone to guide your trail choices depending on if you are hiking or biking.
Take I-93 north to exit 41 from boston and follow 125 north towards Andover. When you come to the Police Barracks on the right turn onto Harold Parker Road to Jenkins Road which you can take to the trailhead. To get to the headquarters of the park follow Jenkins Road to Salem road and take a right on that.