M-203 (Michigan highway)

M-203
M-203 highlighted in red
Route information
Maintained by MDOT
Length:	17.944 mi (28.878 km)
Existed:	1933 – present
Tourist routes:	Lake Superior Circle Tour loop
Major junctions
South end:	US 41 in Hancock
North end:	US 41 / M-26 in Calumet
Location
Counties:	Houghton
Highway system
Michigan State Trunkline Highway System Interstate US State Byways ← M-201 M-204 →

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.

The M-203 designation is maintained by the Michigan Department of Transportation (MDOT) to provide access to McLain State Park. The trunkline is not listed on the National Highway System, a system of strategically important highways. No section of it is located on the Lake Superior Circle Tour, although it is the closest state trunkline to Lake Superior in the area. The highway runs through forest lands and city streets most of the way, with the section along the Portage Lake Canal being residential most of the way.

The southern terminus of M-203 is at the west end of a pair of one-way streets carrying US 41 through the City of Hancock at the bottom of Quincy Hill. Northbound US 41 follows Quincy Street while southbound traffic is directed along Hancock Street. The two directions merge along Lincoln Drive, and M-203 is the two-way, western continuation of Quncy Street west of Lincoln Drive, passing north of the St. Joseph Cemetery. M-203 then runs along the north shore of the Portage Lake Canal turning northward and northwesterly along the canal. South of the canal's northern entry to Lake Superior, MDOT measured the annual average daily traffic (AADT) at 820 vehicles in 2007. By Bear Lake Road, M-203 turns east to the front gate of the state park running parallel to Lake Superior.