This is a nice network of trails that doesn't offer any particularly difficult riding. There are only a few miles of trails, depending on what you feel like doing there. Some of the doubletrack road is smooth and simple, and there are a variety of single track off-shoots one can take, but nothing too drastic. Its a simple and relaxing ride, with some nice scenery and plenty of wildlife. All in all, a great simple ride for a Sunday morning and a good chance to just have some fun and relax. Bring the kids.
95 South to Exit 17 (135W), which becomes Great Plain Ave. Take a left onto Central Ave. This gets confusing - stay on central ave. When you hit the intersection in the middle of Needham, take your left, continuing to follow 135. You'll come to a set of lights after a bit where you'll have to take a left again to stay on Central Ave, which will lead you to the entrace. You'll probably drive past it before realizing that's where it is since the sign is parallel with the road - there's a golf course across the street.
http://www.singletracks.com/item.php?c=1&i=1481