The longest season: Leavenworth, Washington
When to go: Through late November
Why to go: Several leafy routes start from Central Washington's Bavarian-themed town: Trees line Tumwater Canyon on Highway 2, which stretches to the Puget Sound area, while south on winding Highway 97, the forests of Blewett Pass sport red huckleberry bushes, aspens, and cottonwoods. Electric-yellow trees reflect in Lake Wenatchee north of the town.
Where to get the best view: From Waterfront Park downtown, the steep walls of the valley rise in every direction.
Insider tip: Leavenworth's Autumn Leaf Festival falls in September 27–29, Oktoberfest is Fridays and Saturdays October 4–19 (and the town is basically a year-round beer garden anyway).