Katahdin—The Knife Edge Loop Trail Professional Review and Guide
"A demanding loop hike across Maine’s most famous mountain, including a traverse of the renowned Knife Edge ridge. The Katahdin massif encompasses four peaks, a broad, sloping plateau, and a spectacular, serrated ridge that in places is little more than 2 feet wide.
It is Maine’s highest mountain, rising dramatically above the surrounding landscape to a height of 5,267 feet, and the northern terminus of the Appalachian Trail (AT). For many thru-hikers, Katahdin is the culmination of a six-month, 2,000-mile pilgrimage. For day-hikers, it is arguably New England’s most alluring and challenging peak."