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Flickr/Jeffrey Burka

What was already America’s biggest resort got bigger earlier this year when Big Sky bought neighboring Moonlight Basin, both of which share the same mountain, 11,166-foot-tall Lone Peak. It’s also home to the third-biggest vertical drop in the States. The more-than-three-quarter-mile descent is not for the faint of heart: start on the mountain’s eastern exposure (the Big Sky side) and take the Lone Peak Tram to the summit. Cross over to the northern exposure (the Moonlight Basin side) and bomb down one of two double black diamonds before joining up with a trail network that can take you down to the Madison Village base area.