Mackinac Trail, or Mackinaw Trail is the name for two related, but separate, roadways in the US state of Michigan

Michigan

Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....

. The original Mackinac Trail was an Indian Trail that lent its name to the roadways that replaced it. The trail ran from the modern Saginaw

Saginaw, Michigan

Saginaw is a city in the U.S. state of Michigan and the seat of Saginaw County. The city of Saginaw was once a thriving lumber town and manufacturing center. Saginaw and Saginaw County lie in the Flint/Tri-Cities region of Michigan...

 to Mackinaw City

Mackinaw City, Michigan

Mackinaw City is a village in Emmet and Cheboygan counties in the U.S. state of Michigan. At the 2000 census the population was 859. The name "Mackinaw City" is a bit of a misnomer as it is actually a village...

 in the Lower Peninsula

Lower Peninsula of Michigan

The Lower Peninsula of Michigan is the southern of the two major landmasses of the U.S. state of Michigan. It is surrounded by water on all sides except its southern border, which it shares with Ohio and Indiana. Geographically, the Lower Peninsula has a recognizable shape that many people...

 with a branch in the Upper Peninsula

Upper Peninsula of Michigan

The Upper Peninsula of Michigan is the northern of the two major land masses that make up the U.S. state of Michigan. It is commonly referred to as the Upper Peninsula, the U.P., or Upper Michigan. It is also known as the land "above the Bridge" linking the two peninsulas. The peninsula is bounded...

 between St. Ignace

St. Ignace, Michigan

Saint Ignace, usually written as St. Ignace, is a city in the U.S. state of Michigan. As of the 2000 census, the city population was 2,678. It is the county seat of Mackinac County. From the Lower Peninsula, St. Ignace is the gateway to the Upper Peninsula.St...

 and Sault Ste. Marie

Sault Ste. Marie, Michigan

Sault Ste. Marie is a city in and the county seat of Chippewa County in the U.S. state of Michigan. It is in the north-eastern end of Michigan's Upper Peninsula, on the Canadian border, separated from its twin city of Sault Ste. Marie, Ontario, by the St. Marys River...

. The name shifted westward for different roadways in the Lower Peninsula,

Upper Peninsula, previous designation along H-63 before the I-75 freeway was constructed,, the entire road between St. Ignace and Sault Ste. Marie

Lower Peninsula, from US 31 to Mackinaw City, between Petoskey

Petoskey, Michigan

Petoskey is a city and coastal resort community in the U.S. state of Michigan. As of the 2000 census, the city population was 6,080. It is the county seat of Emmet County....

 and I-75 south of Mackinaw City, between the Cadillac

Cadillac, Michigan

Cadillac is a city in the U.S. state of Michigan and is the county seat of Wexford County. As of the 2000 census, the city population was 10,000. The city is situated at the junction of US 131, M-55 and M-115...

area and Petoskey