Located conveniently within the Straits of Mackinac, Duncan Bay Boat Club is 2 miles east of Cheboygan. The marina is on the west shore of the bay. Built inland, the marina provides a safe and quiet harbor in all winds. Although Duncan Bay Boat Club is a private marina, transient and seasonal dockage are available. The east side of the bay is state park land. Duncan Bay is only 14 miles from Mackinac Island, 22 miles from Les Cheneaux Islands, and just 34 miles from the North Channel. The Inland Waterway begins just west of the bay and offers passage through a beautiful chain of lakes by way of the Cheboygan River.
During Michigan's White Pine logging era, the current marina site was a logging community of 500 people know as Duncan. The natural harbor allowed the lake's freighters to easily supply the community and haul away wood used to build the mid-west.