10. For family happy hour, dip into the best outdoor heated pools in the biz. The Grand Summit hotels at the base of Killington, Mount Snow, Attitash, and Sunday River all feature these slopeside soaks. Kids are like ducks to water in the oversized outdoor hot tubs and this muscle-soothing activity is a winner for mom & dad, too. Relax with a victorious view of the trails you tackled that day.