It was located in Leelanau County in the Sleeping Bear Dunes National Lakeshore.

[3] The southern terminus of the highway was at the intersection with M-109 south of Glen Haven, a restored logging village on the shore of Lake Michigan on the Leelanau Peninsula.

M-209 ran past such attractions as the restored General Store and Blacksmith Shop.

[4] The northern terminus of M-209 was located in front of the former US Coast Guard Life Saving Station, now restored as a maritime museum.

Sleeping Bear Dunes National Lakeshore is a United States National Lakeshore located on the "little finger" of the Lower Peninsula of Michigan in Leelanau and Benzie counties.

The park covers a 35-mile (56 km) stretch of Lake Michigan's eastern coastline, as well as North and South Manitou islands.