F.J. McLain State Park is a 443-acre (179 ha) public recreation area on the Keweenaw Peninsula in Houghton County, Michigan. The state park is located on M-203 halfway between Hancock and Calumet. It is about 10 miles (16 km) from each city. The park's offshore sights include sunsets over Lake Superior and the art deco–style Keweenaw Waterway Upper Entrance Light.

M-203 is a north–south state trunkline highway in the Upper Peninsula of the US state of Michigan. It connects McLain State Park with US 41 on each end in Hancock and Calumet. The trunkline has existed since commissioning in 1933 except a period of time when it was temporarily decommissioned.