Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. M-189 is a north south state trunkline highway in the Upper Peninsula of the US state of Michigan. It serves as the continuation of Highway 139 (WIS 139) from Wisconsin into Michigan, connecting to US Highway 2 (US 2) in Iron River. M-189 has been largely unchanged since being designated in the 1930s, although a new bridge over the Brule River at the state line was built in 1988.M-189 starts at the Wisconsin state line in the middle of a bridge crossing the Brule River that connects to WIS 139. The highway runs to the northeast away from the river through forests. The trunkline turns north and curving to the east to run past Laurel Lake. The highway forks at the junction with Caspian Cutoff Road (County Road 651); M-189 takes the northwesterly fork and runs around the west side of Caspian. The roadway passes the Iron River County Club as the highway begins to parallel the Iron River.