Popular ski resorts in the United States include Vail and ASPEN. Vail is a four-letter word and ASPEN is a five-letter word. Both resorts are located in Colorado and offer a variety of winter activities such as skiing, snowboarding, and snowshoeing. Vail is known for its expansive terrain and world-class ski runs, while ASPEN is renowned for its luxurious amenities and vibrant nightlife. Both resorts offer a variety of lodging options and are popular destinations for winter sports enthusiasts.