Wikipedia – http://en.wikipedia.org/wiki/New_Hampshire_Route_112
Kancamagus Highway Fall Foliage
Fall Foliage season at the Kancamagus Highway is by far the best time to visit the Kancamagus. Most people come to the Kancamagus Highway during the foliage season to see the bright colored leaves. The smell of the changing leaves is something you will remember for the rest of your life, it will always take you back to the memories of being at the Kanc.
The eastern terminus of NH 112 and the Kancamagus Highway is in the town of Conway at New Hampshire Route 16 (the White Mountain Highway) and New Hampshire Route 113. Traveling almost entirely within the White Mountain National Forest, the highway follows the Swift River valley west and climbs to the summit of Kancamagus Pass at an elevation of 2,855 feet (870 m), then descends to the valley of the East Branch of the Pemigewasset River, which it follows to Lincoln, the western terminus of the Kancamagus Highway. NH 112 continues west, crossing Interstate 93 and U.S. Route 3 in North Woodstock, then climbing through Kinsman Notch and descending northwest along the Wild Ammonoosuc River to its western terminus, in the town of Bath at U.S. Route 302 and New Hampshire Route 10, about 4 miles (6.4 km) from the Vermont border.