M-77 is a state trunkline highway in the Upper Peninsula (UP) of the US state of Michigan. It runs from US Highway 2 (US 2) near Blaney Park in the south to Grand Marais in the north. The highway borders the Seney National Wildlife Refuge. The northern half has been designated as a Scenic Spur of the Lake Superior Circle Tour. Originally designated by 1919, the highway has not been changed much in its history. By the late 1950s, the highway was paved, completing the modern M-77 highway.