Michigan M25: Ribbon Around the Thumb

M-25 Michigan’s First Scenic Highway

Official M-25 Road Sign

A favorite tour for a motorcyclist is the State Highway Michigan M-25. It’s a 147-mile scenic highway running from Port Huron to Bay City Michigan. With waters of Lake Huron or Saginaw Bay on one side and rolling pasture and farmland on the other, it’s an interesting drive around the Thumb and some of the unique places to visit in Michigan.

A Loop Around Michigan’s Thumb


Officially Michigan M25 is a state trunkline highway in the US state of Michigan. M-25 is part of the Lake Huron Circle Tour for its entire length. Starting at a junction with Business Loop I-69/Business Loop I-94 in Port Huron running north along the coast the highway passes through Lexington, Port Sanilac, Harbor Beach and Port Hope. At Port Austin is the northernmost point of M-25. From here the road turns west and south running through Caseville, Bay Port, Bay, Unionville and ending in Bay City.

A section of M-25 in Bay City was named what is now called a Pure Michigan Historic Byway by the Michigan Department of Transportation (MDOT). Originally called the Bay City Historic Heritage Route you can see historical neighborhoods and large Victorian homes constructed by the lumber barons of the 1800s.

M-25s Roadside Parks and Scenic Turnouts

M-25 Scenic Highway

One aspect that is truly unique to M-25 is the number of places to stop, rest or take in the view. There are a number of interesting turn–offs provided by MDOT to get off the highway. Most are right on the beach.

Lake Huron – Located South of Port Sanilac in Sanilac County. This stop has great views of Lake Huron, with stairs from the park to the beach. Historical Marker for “Great Lake Storm of 1913” when the sudden tragic storm took 235 lives and 10 ships sank.

Four Mile Scenic Turnout – Location is south of Forestville in Sanilac County. Offers some of the best views of Lake Huron, with stairs from the park on the bluff down to the beach.

Michigan M25
Michigan’s Famous Roadside Park Signs

White Rock – Located south of Atwater Road, Sherman Twp in Huron County. Great views of Lake Huron and White Rock. Steps to beach, observation deck, walking trails connecting to a non-motorized path on Michigan M25. White Rock is a large, white, offshore boulder used as a boundary marker to define the territory released by the Native American tribes of Michigan to the United States under the Treaty of Detroit in 1807. The park also is a stop along the ShoreRidge Indian Trail that started near Fort Gratiot and ends in Saginaw.

Jenks Park on Michigan M25
Jenks Park has a rustic feel.

Jenks – Located 2 miles west of Port Austin in Huron County. Features a spectacular view of Saginaw Bay, with beach access, restroom, and picnic facilities.

Saginaw Bay Beach
Thompson Scenic Turnout great views

Thompson Scenic Turnout – Located 10 miles southwest of Port Austin in Huron County. The Park features 2 large grindstones and access to a sandy beach on Saginaw Bay, picnic tables, bathroom, and benches.

Brown – located 3 miles south of Bay Port in Huron County. Contains the historical Marker for “The Great Fire of 1881.” A million acres were devastated in Sanilac and Huron counties. The park is shady and an ideal picnic or break spot along M-25.

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Mike Hardy

Author of a fun loving and event blog covering topics of the Upper Thumb of Michigan , the wind energy capital of the Great Lakes. Offering great trove of information on Wind Energy, Cheeseburger in Caseville, Saginaw Bay, Sailing.

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