“It’s liquid ice, dude.” Surfing in frigid waters has taken off in the past decade thanks to overall growth in the sport and advances in wetsuit technology. Duluth, Minn., is “one of the places that has the highest potential for major waves” on the Great Lakes, according to John Downing, director of the Minnesota branch of Sea Grant, a government-funded water science organization. It sits at the end of a 300-mile-long deep stretch of Lake Superior that receives mighty blasts of cold arctic air—ideal conditions for whipping up waves that rise as they hit the coastal shore. #surf #surfing #duluth #minnesota #greatlakes #greatlakessurfing #wsj #wallstreetjournal #thewallstreetjournal | Participating in this activity could result in you or others getting hurt. | hot water