This year 58-year-old legend offers the highest skiable terrain on the north-American continent. Half of the mountain is above timberline with open bowl skiing and snowboarding through spring and into early summer. One of its signature runs, Pallavincini, is one of Colorado's longest and steepest trails. A-Basin is truly a rider's paradise, with extreme terrain, a budding park system, cheap eats and a laid-back, friendly atmosphere that will make riders of any ability feel comfortable. It also boasts the longest season around, often staying open well into July.