This route has had some variations & discussion of the best combination of trails. We preserve the discussion from our old website here. The FKT progression is also documented.
Tim B (6/30/2016):
The Tri-State U (MA, CT, NY) is a non-established name for a route that goes thru Mass, CT, and NY. It crosses over 8 peaks in three states including the highest peak and point (not the same) in CT.
The Franconia Ridge Loop is a popular, 8+ mile route in the White Mountain National Forest of New Hampshire. It is accessed from Franconia Notch Parkway near the Lafayette Campground. The route goes by the Greenleaf Hut and summits Mt Lafayette (5240'), Mt Lincoln (5089') and Little Haystack (4780') on Franconia Ridge, see map below from sectionhiker.com.
Wikipedia: The Zoar Trail is a 6.5-mile (10.5 km) Blue-Blazed hiking trail "system" in the lower Housatonic River valley in Fairfield County and is entirely in the
MAINE TRAIL FINDER: "Pleasant Mountain is southern Maine’s tallest mountain at 2,006 feet. The nearly ten mile trail network offers a variety of moderately challenging day hikes. The summits provide commanding views of the White Mountains to the west and spectacular views to the east."