Pittsfield State Forest
The Pittsfield State Forest is the best place in Berkshire County for beginner mountain bikers to ride. There is a pretty good network of easy trails we refer to as the Family Trails.
Advanced riders can get in a good workout climbing and descending the Honolulu and Turner Trails.
Take a look at the super secret underground map of trails in the Pittsfield State Forest and Balance Rock State Park for a good overview of what's out there.