M-25 (Michigan highway)

M-25 marker
M-25
Map
M-25 highlighted in red
Route information
Maintained by MDOT
Length147.638 mi[1] (237.600 km)
Existed1933[2][3]–present
Tourist
routes
Lake Huron Circle Tour
Center Avenue Heritage Route
Major junctions
South end BL I-69 / BL I-94 at Port Huron
Major intersections
West end I-75 / BS I-75 / US 10 / US 23 at Bay City
Location
CountryUnited States
StateMichigan
CountiesSt. Clair, Sanilac, Huron, Tuscola, Bay
Highway system
US 25 M-26

M-25 is a state trunkline highway in the US state of Michigan. The route follows an arc-like shape closely along the Lake Huron shore of the Thumb in the eastern Lower Peninsula between Port Huron and Bay City. It serves the lakeshore resorts along Lake Huron and Saginaw Bay and generally lies within sight of the lake and the bay. All is surface road and generally scenic, except for the freeway segment near the junction with Interstate 75 (I-75) and connection into the US Highway 10 (US 10) freeway.

Between Port Huron and Port Austin it is the north–south highway was formerly US 25 before the designation was removed. Between Port Austin and Bay City it is an east–west route that appeared on some maps as US 25 and on some maps as M-25. Since the 1970s, when all of US 25 was deleted north of Cincinnati, Ohio, it is entirely signed as M-25.

  1. ^ Cite error: The named reference PRFA was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference MSHD32-10 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference MSHD33-09 was invoked but never defined (see the help page).