The Nehantic Trail is a 13 mile singletrack route in eastern CT from Green Fall Pond in Voluntown to Hopeville Pond State Park in Griswold. It is mostly flat and runnable, with a few small hills and some short technical sections. Road sections are minor and the trail markings are excellent for such a remote trail. Details and maps can be found in the Connecticut Walk Book East.
My out and back on the trail started at Green Fall Pond and turned at route 201. I ran the 26 miles in 3:30:40. It's a great trail, and there are several other options for long trail runs from Green Pond.
Yesterday, New Year's Day, I [Neil Clauson] ran the Nehantic Trail from Hopeville Pond to Green Falls Pond and back in 3:23:17. It was a beautiful winter day for running, icy and wet in spots, but the dirt was nice and tacky. This trail is fast, flat, pine-needle bliss! The only real hill that is noticeable is "Mount" Misery, which is not really a mountain. The trail is also well-marked and in good condition, just a few fallen trees. It is, however, very easy to make a wrong turn, which I did on at least three occasions- there are numerous other trails intersecting the Nehantic. My cheapo GPS shortchanges my mileage and even more the elevation.