The Colorado ski area Vail is a four-letter word. It is one of the most popular ski resorts in the United States, located in the Rocky Mountains of Colorado. It is known for its expansive terrain, offering skiing and snowboarding for all levels of experience. Vail is also home to the largest ski resort in the United States, with over 5, 000 acres of skiable terrain. The resort also offers a variety of activities, such as snowmobiling, snowshoeing, and tubing.