The Notch Trail is a long trail that runs north-south through the Mount Agamenticus Conservation Region. All the major summits in this area (Mount Agamenticus, Second, and Third Hill) are all accessible from the Notch Trail via spur trails; you can make seemingly-endless combinations of routes from the Notch Trail, making a great jumping off point to explore what this area has to offer.
Some portions of Notch Trail can be a little rugged depending on recent rainfall. A mountain bike, gravel bike, or anything really other than a road tire would be best.