north of Bay City. The short freeway was originally the northern end of the US 23 freeway in the area when it opened. The current designation was applied in 1967. See also References External links M-13 at Michigan Highways 013 Interstate 75 Dixie Highway Lake Huron Circle Tour Transportation in Shiawassee County, Michigan Transportation in Genesee County, Michigan Transportation in Saginaw County, Michigan Transportation in Bay County, Michigan Transportation in Arenac County, Michigan U.S. Route 23