These folks are really into it. The site has a great gallery of action shots all conveniently thumbnailed for speed.
Speed is their game.
The DN is the largest ice boat class in the world, so named because the boat design won a contest sponsored by the Detroit News. The DN measures 12 feet by 21 inches and carries a 60 square foot sail. The little craft performs typically at two to four times wind speed and maxes out at about 60 mph. T he Association was incorporated in 1962 and currently boasts 2000 members in North America and Europe. Obviously, the sport is very big on the Great Lakes but Burlington, Vermont hosts the Eastern Regional Regatta, annually.