Yostmark Backcountry Tours and Nordic Ski School is a full service ski and snowboard guide service in the Tetons that also offers instruction in skate, classic and telemark skiing.  Based in Driggs, ID on the West Side of the Teton Range, Yostmark Backcountry Tours offers excellent backcountry access to the best powder skiing in the West. Rich Rinaldi, with his professional guides and instructors, cater to individual skier and boarder abilities. Not only can you enjoy some of the best powder skiing in the world, but you can also improve your skiing and snowboarding skills!