Arapahoe Basin, Keystone, and Breckenridge are three of the most popular ski resorts near Denver that offer excellent skiing opportunities for all levels. Arapahoe Basin has over 100 trails across its 13,050 foot peak and a 400-acre advanced area. Keystone spans three mountains including an area for advanced tree skiing. Breckenridge has nearly 150 trails across four mountains, including a famous terrain park and challenging advanced runs. All three resorts are within a couple hours of Denver.