Browse Items (1 total) Tags: Straits of Mackinac Browse All Browse by Tag Search Items Sort by: TitleCreatorDate Added Map of Emmet, Cheboygan, and Presque Isle Counties including The Straits of Mackinac and Showing the Inland Route through The Chain of Lakes Tags: Cheboygan County, Emmet County, Inland Waterway, Presque Isle County, Straits of Mackinac, Transportation Featured Item Petoskey Post Office southeast corner of Mitchell St. and Petoskey St., 1915-1962. Demolished 1966-1967.