Green Mountains, range of the Appalachian Mts., extending 250 mi (402 km) from north to south and extending from S Que., Canada to Vt. Mt. Mansfield, 4,393 ft (1,339 m) high, in Vermont, is the tallest peak. The range has low, rounded peaks, fertile valleys, and streams. Timber and maple syrup are the main products of the heavily forested mountains, much of whose area is in national and state forests. The mountains also yield high-quality marble and granite, with world-famous quarries in Barre, Vt. The scenic Green Mts. are a year-round vacation area, well known for its ski resorts. The Long Trail for hikers runs 261 mi (420 km) from Massachusetts to Canada; the Appalachian Trail runs through the southern part of the Green Mts.