Keystone Colorado is a terrific ski resort, with over 3000 vertical acres and the only "night-skiing" in the area: it's great to be able to extend your ski day after three or four p.m., particularly during the spring skiing weeks when the daytime hours are longer. Keystone's also a place where visitors can try ski biking
(which is easier than learning to ski, reportedly.)
Keystone also has a promotion
that's offered the whole season: kids 12 and under ski or board for free when lodging for two or more days is booked.
Photo courtesy of Vail Resorts.