Located near the mouth of the Saginaw River in Bay City, Michigan, Bay Harbor Marina has been the preferred destination for boating enthusiasts since 1969. Our full-service facility spans 408 slips with accommodations up to 60 feet and side ties extending to 90 feet, complemented by nearly 200,000 square feet of year-round storage options. As a proud member of the TopSide Marinas family, we combine decades of local expertise with the resources and professionalism of a trusted network of premier Great Lakes marinas. Our location provides unmatched access to Saginaw Bay and Lake Huron's most beautiful destinations. Boaters can quickly reach open water for cruising, anchor at pristine beaches, or enjoy a smooth cruise up the Saginaw River. Whether you're planning day trips or extended voyages exploring the Great Lakes, our strategic position gives you immediate access to some of the finest boating waters in the region. The weather-safe harbor features first-class floating docks with wide piers and generous fairways, making boarding, navigation, and docking straightforward even in challenging conditions.