Now's the time to get in on the next great mountain getaway: Big Sky, Montana. While more established resorts are crunched for space, Big Sky is still in relative infancy—and about to expand its skiable terrain by 1,800 acres. Many of the new trails are on property belonging to Moonlight Basin Ranch, where savvy buyers can purchase ski-in, ski-out lots, starting at $340,000—a fraction of what comparable land costs elsewhere. This is part of Moonlight Basin's next phase of development. The first phases—completed over the last eight years—included a state-of-the-art lodge, penthouse suites, log cabins, and town houses. Moonlight is also putting the finishing touches on a collection of three-bedroom chalets (from $610,000). Of course, at Big Sky, some of the best things are free: nothing beats a day of fly-fishing on the Gallatin River. Moonlight Basin Ranch, 406/995-3322, fax 406/995-3400;