Long relegated to back yards and backwoods cabins, saunas are enjoying a heyday in northern Michigan. Popup saunas appear at community events, portable saunas are available to rent, and private sauna gatherings transition effortlessly into pot-luck dinners with friends. The Sun interviewed Vlad Borza—co-organizer of the second annual Michigan Sauna Fest this weekend—to get his read on sauna popularity, what’s new at Sauna Fest, spring saunas vs winter saunas, what he does when he’s not sweating in a tiny house, and his vision for a floating sauna on a barge. Borza of Sleeping Bear Saunas and Nick Olson of Hearth Sauna—proselytizers of the local sauna movement—co-organized the Michigan Sauna Fest, which takes place in Traverse City’s Clinch Park from Friday, April 10, until Sunday April 12.