I've only ridden the northern half of this route as mapped -
Gilead south to Conway, NH. As the first reviewer said,
the road was pretty rough in some places,
but it was a nice twisty road and FUN!
Another plus - if it's a hot day, the road is fairly narrow and
mostly through old-growth forest, so you're in the shade most of the time.
Very nice narrow little twisty road that has a patchy surface in places. Good little ride.