I hiked down this trail last June (2008). The Quiddy River is an incredible river. The forest (that is remaining) is old and big. The trail was faint in most areas, seemingly up kept only by moose

Clear cutting made the trail hard to follow at a couple spots but nothing serious.
The waterfalls are beautiful on this river. And we had a wonderful campsite in a hardwood grove near the mouth of the river. In the morning we explored Martin Head. Adair's shuttled us back to the car later in the day.
It was a great trip. What a fantastic way to arrive at Martin Head.
Graham