M-109 (Michigan highway)

M-109
M-109 highlighted in red
Route information
Maintained by MDOT
Length:	6.831 mi (10.993 km)
Existed:	c. May 1, 1929 – present
Major junctions
South end:	M-22 near Empire
North end:	M-22 at Glen Arbor
Location
Counties:	Leelanau
Highway system
Michigan State Trunkline Highway System Interstate US State Byways ← M-108 M-110 →

M-109 is the designation of a state trunkline highway in the Lower Peninsula of the US state of Michigan that runs between Empire and Glen Arbor. The highway is a loop connected to M-22 at both ends that allows tourists access to Sleeping Bear Dunes National Lakeshore and the located on a section of sandy forest land between Lake Michigan and Glen Lake. The trunkline traverses an area named the "Most Beautiful Place in America" by Good Morning America, the morning show on ABC. The highway was designated by 1929 and fully paved in 1939.

M-109 starts at an intersection on M-22 north of Empire. The trunkline runs northward along Dune Highway past Maple Grove Cemetery and through woods in the Sleeping Bear Dunes National Lakeshore. The area was named the "Most Beautiful Place in America" by Good Morning America in August 2011; the designation came after a social media campaign to capitalize on the show's website poll. Further north, the highway passes the entrance to Pierce Stocking Scenic Drive before reunning along the western shore of Glen Lake. Near the northwestern corner of the lake, M-109 passes the entrance to the Dune Climb in an area that's predominantly fields. The trunkline makes a 90-degree turn at the intersection with Glen Haven Road, the former M-209, south of Glen Haven, a former logging town on the shores of Lake Michigan. M-109 turns easterly at the intersection to follow Harbor Highway. It runs through another wooded area between Glen Lake and Sleeping Bear Bay. The highway passes the D.H. Day Campground and enters Glen Arbor, following Western Avenue. At the intersection with M-22 (Ray Street), M-109 terminates in the middle of town.