Where adventure lives! Quench your thirst for big family fun at Avalanche Bay, Michigan's Largest indoor waterpark, and voted Michigan's best water park by the readers for The Detroit News! At Avalanche Bay Indoor Waterpark we transport guests to a winter wonderland enjoyed at a comfortable 84 degrees! Slides, rides, kid's pools, climbing wall, lazy river, even a surf simulator there is something for everyone at Avalanche Bay!