IN THE COLORADO BACKCOUNTRY — Not all epic skiing travelogues involve long waits at airports, helidrops and food poisoning from mystery meat. Backcountry stashes offer the opportunity to know a not-so-far-away off-piste space intimately and intensely. To do so, you can build a cognitive map of the place, learning through experience and mishap, from the relatively more easily accessed out-of-your-comfort zones closer to home.