Route 17 between South Starksboro and Irasville. The Mad River Glen, through the Green Mountains in central Vermont, is best known for its skiing, but for motorcyclists, the area is traversed by Route 17, a giant paved slalom course. For 15 miles, the tarmac twists and ascends to the southern terminus of Camel’s Hump State Park. There’s a nice pull-off where you can admire the view and make mental plans to improve your skills at riding tight hairpins. From there, the road descends through the trees before calming down and leveling out.