Are you searching for crazy family fun?! Well, you've just found it! At 88,000 square feet, Avalanche Bay is the largest indoor waterpark hotel in Michigan offering huge amounts of water fun for every age. Centrally located at the heart of Boyne Mountain Resort, this wet and wild waterpark is always 84 degrees and open all year 'round, making it the perfect vacation destination or just a day trip. Come see why Midwest Living voted us with Boyne Mountain Resort one of their "45 Midwest Resorts We Love".