More and more ski resorts are going green—meaning you can feel good about living it up. In Colorado's recently renovated Snowmass village, the year-old Snowmass Viceroy offers 173 luxe rooms and a sprawling spa complex. But thanks to smart construction (think low-flow faucets and high-efficiency heating systems) as well as gaudy extras like an electric-car charging station, the lodge is up for LEED Silver certification. Roll up in your hybrid and parking's free (from $225 until December 22; from $595 December 23–April 10; viceroysnowmass.com). Meanwhile, Vermont has essentially converted to a green-ski state. Over the past decade, mountains there have teamed with Efficiency Vermont, a Burlington-based clean-energy consulting firm, to equip resorts with energy-efficient lights; easier-flow snowmaking pipes; and halfpipes built from earth, reducing the amount of additional snow needed. In this case, the greenest resort is also the whitest: Jay Peak, which averages 355 inches of annual snowfall. Jay is now two years into an eight-year, $140 million upgrade that's brought about the 83,216-square-foot, eco-friendly Tram Haus Lodge (from $119 per person; jaypeakresort.com).