High Quality Content by WIKIPEDIA articles! M-186, is a state trunkline highway in the U.S. state of Michigan. It functions as a connector highway wholly contained in Grand Traverse County, which is located in the northwestern Lower Peninsula. The western terminus is at M-113 east of Kingsley and the eastern terminus is at U.S. Highway 131 (US 131) west of downtown Fife Lake. The current incarnation of M-186 is the second usage of the designation. The first was used for a highway in the Upper Peninsula in the 1930s.