With the Rocky Mountains as its backdrop and over 2,200 acres of ski terrain, Yellowstone Club in Big Sky, Mont., is a wonderful retreat for outdoorsy adventurers and avid skiers alike. The 13,600-acre private community offers 15 lifts, more than 60 ski trails, a terrain park for snowboarders and skiers, and lessons for skiers and snowboarders of all ages and skill levels. Listings at the idyllic retreat include 31 home sites, 21 custom residences, three ranches, and seven condominiums. In addition, around 100…