M-12 (Michigan highway)

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Location IronwoodSault Ste. Marie
Length 406.63 mi[3] (654.41 km)
Existed c. July 1, 1919[4]–November 11, 1926[1][2]

M-12 is a former state highway in the Upper Peninsula of Michigan. It was replaced in 1926 by:

Since 1926, M-12 north of the St. Ignace area has been replaced by:


  1. ^ Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: U.S. Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via Wikimedia Commons. 
  2. ^ Michigan State Highway Department (December 1, 1926). Official Highway Condition Map (Map). [c. 1:823,680]. Lansing: Michigan State Highway Department. 
  3. ^ Michigan Center for Geographic Information (May 2007). "Geographic Data Library". Michigan Department of Information Technology. Retrieved February 27, 2008. 
  4. ^ Michigan State Highway Department (July 1, 1919). State of Michigan (Map). Scale not given. Lansing: Michigan State Highway Department. Upper Peninsula sheet. OCLC 15607244. Retrieved December 18, 2016 – via Michigan State University Libraries. 
Browse numbered routes
US 12 MI M-13