https://www.adventureprojects.net/
This great resource has an abundance of outdoor trails for a variety of different activities, and different groups that go on trips to specific locations. For more information visit the website above.
Adventure Projects
etownebbbsAshfield, Bernardston, Buckland, Charlemont, Colrain, Conway, Deerfield, Erving, Gill, Greenfield, Hawley, Heath, Leverett, Leyden, Millers Falls, Monroe, Montague, New Salem, Northfield, Orange, Outdoors, Rowe, Shelburne Falls, Shutesbury, Sunderland, Turners Falls, Warwick, Wendell, Whately