side of town as M-25 moves inland through town. North of town, the trunkline parallels an old routing of the Chesapeake & Ohio Railway as it is once again renamed Lakeshore Road. The highway moves farther inland north of Rubicon and Port Hope as it begins to round the tip of the Thumb. In Grindstone City, M-25 loses the Lakeshore Road name in favor of Grindstone Road all the way to Port Austin. West to Bay City Port Austin is the location of the historical northern terminus of US 25. Through town, M-25 turns north along Lake Street and runs concurrently with the northern end of M-53. The highway turns westward on Port Austin Road along the lake where M-53 terminates; this is also the point where the M-25 signage changes from northbound to westbound. West of town, M-25 turns south along the Saginaw Bay and meets Port Crescent State Park. From here south west, M-25 hugs the bay and its miles of beaches. North of Caseville is the Albert E. Sleeper State Park. Through Caseville, M-25 uses Main Street and passes the city beach off State Street. McKinley is home to the Scenic Golf & Country Club and Wild Fowl Bay. M-25 follows the shore of Wild Fowl Bay, a smaller bay off Saginaw Bay, to the city of Bay Port and the western terminus of M-142 on Fairhaven a smaller community south of Bay Port. From here south, the road is called Unionville Road and turns inland to Sebewaing. At Unionville, M-25 turns more westerly to round the bottom of Saginaw Bay into Bay City along Bay City-Forestville Road in Tuscola County. In the community of Quanicassee, it transitions to Center Road and crosses into Bay County. M-25 is routed the one-way street pair of 7th Street and McKinley Street before crossing the Veterans Memorial Bridge over the Saginaw River. West of the bridge, the one-way pairing of Jenny Street and Thomas Street are used before the two merge into Thomas Street west of the M-13 intersections. The western terminus is at the junction of I-75/US 23 and US 10. As the roadway crosses the I-75/US 23 freeway it feeds into the eastern end of US 10 freeway. History Previous designation The M-25 designation was first used by July 1, 1919. in the Upper Peninsula. The highway ran from Skandia along what is today M-94 to Munising. From