When looking to join an ATV club, it's really just about finding a good group of folks that have the same interests you have, riding your ATV and riding it safely and responsibly. If you live in the Massachusetts area, you will find a good number of ATV riding clubs to join.
North Quabbin ATV Association located in Athol, Massachusetts is a local group from the North Quabbin Woods towns. Actively work with the state for more areas of legal riding. This group rides nearly every weekend. If you're looking for a busy group that loves to ride, this is the group for you to join!
Check out the New England ATV Association that is the State Association. As with all State Associations, this group promotes safety classes, continuing rider education, and also teaches ATV riders to be environmentally friendly.
Western Mass ATV Association is a very specialized group of ATV riders. They are part of the Berkshire Trails Council, and this group is dedicated to ATV trail maintenance, environmentally friendly resource preservation, emergency responses, and furthering education teaching ATV riders the importance of responsible use of trail systems.
Finding an ATV Group will not only widen your riding horizons, it will allow you to meet a new group of friends that love to do what you do, ride your ATV in the great State of Massachusetts!