Groton Town Forest is a 7.2 mile lightly trafficked loop trail located near Groton, Massachusetts that features a river and is good for all skill levels. The trail offers a number of activity options and is accessible from May until September.
cross country skiing
Great walking trail. It has several trails so you can choose your own length. Dogs are allowed off leash and everyone brings theirs. there is also a river which is beautiful to look at and for the dogs to play in.
Perfect for running and biking