Michigan Highways: Since 1997.

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Southern Terminus:    Ohio state line, five south of Erie
Northern Terminus:    US-24/Telegraph Rd, five miles north of Monroe
Length: Updated19.480 miles
Maps: New! Route Map of M-125
Notes: M-125 is designated as such since the highway traverses a portion of the former US-25 in Michigan. This highway runs mostly-parallel to, and within approximately 1–2 miles of, US-24 for its entire length. As such, according to some MDOT sources, M-125 has long been a "turnback candidate" whereby MDOT would prefer to transfer the road to the local authorities and the route would no longer be designated M-125.
  The portion of M-125 through downtown Monroe was designated as one of Michigan's first Historic Heritage Routes. From MDOT: "The City of Monroe in conjunction with MDOT nominated the portion of M-125 which runs through the Old Village Historic District, and is contiguous to the East Elm - North Macomb Historic District, and the Custer Equestrian Monument."
  New! Although
  New! In "State Trunkline Needs, 1960–1980," a set of maps prepared by the State Highway Dept's Office of Planning, Programming Division in 1960 showing possible additions, upgrades and improvements to the state trunkline system over the ensuing twenty years, there was no recommendation from MSHD staff for the route of M-125—as in 1960, there was no M-125! The previous iteration of the route in Bay Co had been turned back to county control in 1957 and the current iteration would not exist for another 13 years!
History: 1900 (Jan 1) – The
  1900 (Jan 1) – The
  1900 (Jan 1) – The
  • By
  • During
  1931 (June 19, Aug 31) Updated – On June 19, the State Administrative Board approves a new short spur highway from US-2 west of Manistique to serve the new Thompson State Fish Hatchery as part of 30 additional miles of roadway approved to be added to the trunkline sytem. (At this time, US-2 runs along present-day Co Rd 442 west of Manistique via Cooks instead of the present-day shoreline routing—see map at right.) Then 10½ weeks later on August 31, a new 1.5-mile long spur route, designated M-125, is determined as a state trunkline highway five miles west of Manistique, beginning at US-2 at the southern tip of Indian Lake and continuing southerly to the Thompson State Fish Hatchery just north of the hamlet of Thompson.
  1936 (early July) Updated A new relocation for US-2 from southwest of Cooks easterly through Thompson and into Manistique is completed and opened to traffic, running along the Lake Michigan shore between Thompson and Manistique, although the former route (along present-day Co Rd 442) is not yet cancelled as a state trunkline route. Until now, M-149 existed solely as a spur route leading northerly from the former US-2 along the west shore of Indian Lake to Palms Book State Park. With the completion of the relocation for US-2, the existing 1.5 mile route of M-125 from the former US-2 southerly to the Thompson State Fish Hatchery is redesignated as part of M-149—with the segment of the former US-2 between the two M-149 junctions becoming signed as part of the new, extended M-149 route—while the 1.35-mile long county roadway from the southern end of M-125 at the fish hatchery southerly to a jct with relocated US-2 in "downtown" Thompson is now "marked-and-maintained" as part of M-149, although a formal determination for that portion of the route has not yet happened. This marks the end to the first iteration of M-125 after only five years of existence.
1937 (Aug 30) – As noted above, much of the former route of US-2 between Cooks and Manistique along present-day Co Rd 442 is turned back to local control, with the exception of the portion between M-149 and M-125. An additional 1.35 miles of new state trunkline is tacked onto the southern end of M-125, connecting with the new US-2 at Thompson. The State Highway Dept then redesignates the entire trunkline beginning at US-2 at Thompson then northwesterly to Palms Book State Park as M-149, thus bringing an end to the first iteration of M-125.
  1931 (Nov 11) New! – The State Administrative Board approves adding the three miles of Parish Rd in Bay Co from US-23 (present-day M-13) westerly as a state trunkline highway on the same day it approves 39 other state trunkline changes, most of them the elimination of many of the short (1–3 mile long) spur routes leading into small hamlets and communities from nearly state trunkline routes across the state. Ironic that on the day so many seemlingly superfluous routes are okayed for deletion that a three-mile long spur route from "nowhere" to "three miles west of nowehre" is added with no discernable purpose whatsoever.
  1938 (Dec 6) – Parish Rd from US-23 (present-day M-13) to Seven Mile Rd in central Bay Co is assumed into the state trunkline system at a length of 3.0 miles and is designated M-125. The overall purpose for this short spur route is not clear.
  1945 – All three miles of M-125 are hard-surfaced.
  1957 (Jun 24) – The short 3-mile spur trunkline designated M-125 in Bay Co is transferred back to local control. As noted above, the purpose for this route was never evident.
  1973 (Sept 26) Updated – The Michigan State Highway Dept announces that now that I-75 is completed and opened to traffic through Detroit, the US-25 designation in Michigan will be discontinued. Michigan and Ohio transportation officials have been considering decommissioning US-25 in both states since 1969. It will be five more months before all US-25 route markers are removed in Michigan. As the segment of US-25 between the Ohio state line and US-24/Telegraph Rd north of Monroe is remaining on the state trunkline highway system, a new route designation will be required for this segment of roadway and the Dept of State Highways & Transportation assigns the M-125 designation to this segment.
  1974 (Winter) New! – All US-25 route markers in the State of Michigan come down as a result of that route's decommissioning and are replaced with M-125 signage along the portion of the route from the Ohio state line south of Erie northerly through Monroe to US-24/Telegraph Rd in Frenchtown Twp.
  1996 (mid-March) New! – The portion of M-125 through the City of Monroe becomes the state's first Historic Heritage Route. "The City of Monroe in conjunction with MDOT nominated the portion of M-125 which runs through the Old Village Historic District, and is contiguous to the East Elm - North Macomb Historic District, and the Custer Equestrian Monument," notes MDOT. The department approves the designation in February and it becomes official one month later after 30-day waiting period and no comments against the designation were received.
  1900 (Jan 1) – The
  1900 (Jan 1) – The
  1900 (Jan 1) – The
  1900 (Jan 1) – The
  1900 (Jan 1) – The
Controlled Access: No portion of M-125 exists as freeway or expressway.
NHS: No portion of M-125 is on the National Highway System (NHS).
Pure Michigan Byway: Pure Michigan Highways route markerMonroe Street Historic Heritage Route – From MDOT: "M-125 through the City of Monroe was designated as a Historic Heritage Route. The City of Monroe in conjunction with MDOT nominated the portion of M-125 which runs through the Old Village Historic District, and is contiguous to the East Elm–North Macomb Historic District, and the Custer Equestrian Monument." (As of mid-2021, it was still signed as an Historic Heritage Route and had not been re-signed as a Pure Michigan Byway.)
Memorial Highways:  New! The following Memorial Highway designations have been officially assigned to M-125 by the Michigan Legislature:
  • Veterans Memorial Road – M-125 in its entirety. From MDOT: "Title 38 of the Code of Federal Regulations defines a veteran as “a person who served in the active military, naval, or air service and who was discharged or released under conditions other than dishonorable.” This definition explains that any individual that completed a service for any branch of armed forces classifies as a veteran as long as they were not dishonorably discharged."
  • Clara Barton Memorial Highway – "The portion of M-125 beginning at the border between Michigan and Ohio in Monroe County and extending north to the intersection with US-24 and the portion of US24 beginning at the intersection of M-125 and extending north to I-96 in Wayne County..." From MDOT: "Miss Barton was born at North Oxford, Massachusetts in 1821. In 1881 she founded the American Red Cross with headquarters at Dansville, New York. In September of the same year, the first major disaster in which the American Red Cross gave a helping hand was a devastating forest fire in Lapeer, Tuscola and Huron counties in which 125 lives were lost and thousands made homeless without food or shelter. Miss Barton and her little band of earnest assistants gathered blankets, clothing and other necessities for the suffering refugees. Clara Barton died in 1912 at the age of 91."
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