M-29 highlighted in red | ||||
Route information | ||||
Maintained by MDOT | ||||
Length | 41.634 mi[1] (67.003 km) | |||
Existed | 1926[2]–present | |||
Major junctions | ||||
South end | ![]() ![]() | |||
North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Michigan | |||
Counties | Macomb, St. Clair | |||
Highway system | ||||
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M-29 is a state trunkline highway in the US state of Michigan that runs in a south–north direction from Chesterfield Township to Marysville. It generally runs along the shore of Lake St. Clair and the St. Clair River.
The M-29 designation has been used twice in Michigan starting in 1919. The first designation near Lansing was replaced by U.S. Route 27 (US 27) in 1926. At that time, the M-29 designation was moved to the east side of the state along the current routing and farther north along part of what became US 25 and M-25. The 1933 extension of US 25 replaced the northern section of M-29 leading to the current location of M-29.