Mackinac Island State Harbor
- Dates Open: Mid-May to mid-October Amenities: water electricity (30 & 50-amp) restroom showers pump-out ice dog run day use dockage grills/picnic tables wifi/internet refuse receptacles recycle bins U.S. Customs check-in Notes: Mackinac Island State Harbor, Clean Marina certified, is the destination harbor of Northern Michigan. Due to the Port Huron/Chicago sail boat races, reservations are limited from mid-June to late July. It is also a working harbor. It is not completely protected and can be a bit choppy due to ferry boat traffic.
