Hidden Valley Ski.Tube.Ride. offers snow skiing, snow boarding and snow tubing. With 100% snow-making capabilities to help Mother Nature, Hidden Valley is open during the season daily, which includes night skiing. Offering green, blue and black runs, equipment rental, group lessons and private lessons. Or come for the excitement of the Polar Plunge Tubing Park, which is like sledding only better. Enjoy the thrill of riding down a 1,200 ft. snow-covered slope lane on your snow tube. Then ride the conveyor back to the top to slide down again. No climbing the hill. During the season, Polar Plunge is open to the public Friday through Sunday.