Michigan consists of two peninsulas that lie between 82°30' to about 90°30' west longitude, and are separated by the Straits of Mackinac. The 45th parallel north runs through the state—marked by highway signs and the Polar-Equator Trail—along a line including Mission Point Light near Traverse City, the towns of Gaylord and Alpena in the Lower Peninsula and Menominee in the Upper Peninsula. With the exception of two small areas that are drained by the Mississippi River by way of the Wisconsin River in the Upper Peninsula and by way of the Kankakee-Illinois River in the Lower Peninsula, Michigan...
Source: Wikipedia (as of 04/11/2019). Read more from Wikipedia