Western Ski Resort is a term used to describe ski resorts located in the western United States. Two of the most popular ski resorts in the western United States are Alta and Vail, both of which have four letters. Alta is located in Utah and is known for its steep terrain and deep powder snow. Vail, located in Colorado, is one of the largest ski resorts in the United States and is known for its expansive terrain and luxurious amenities.