Wisconsin Highway 42

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State Trunk Highway 42 marker

State Trunk Highway 42
Route information
Maintained by WisDOT
Length 137.86 mi[1] (221.86 km)
Lake Michigan Circle Tour
Major junctions
South end WIS 23 / WIS 28 in Sheboygan
North end Washington Island Ferry Dock in Northport
Counties Sheboygan, Manitowoc, Kewaunee, Door
Highway system
WIS 41I-43

State Trunk Highway 42 (often called Highway 42, STH-42 or WIS 42) is a state highway in the U.S. state of Wisconsin. It runs for about 138 miles (222 km) north–south in northeast Wisconsin from Sheboygan to the ferry dock in Northport. Much of the highway is part of the Lake Michigan Circle Tour from the eastern junction with U.S. Highway 10 (US 10) in Manitowoc to its junction with WIS 57 in Sister Bay.

Route description[edit]

Sheboygan County through Kewaunee County[edit]

The three-highway terminus in Sheboygan; Highway 42 begins at the intersection, going northward.

WIS 42 begins at the intersection of North 14th Street and Erie Avenue (also known as Kohler Memorial Drive) in downtown Sheboygan, a block north of the bridge crossing the Sheboygan River. The intersection is the terminus of two other state highways: WIS 23 and WIS 28.

WIS 42 follows North 14th Street to Calumet Drive, which heads out of the city in a northwesterly direction to its interchange with Interstate 43 (I-43) at exit 128 which has four roundabouts within a mile; two controlling freeway access, a retail development with Walmart and Menards at Vanguard Drive, and then CTH Y. The route continues to the northwest into the city of Howards Grove past Howards Grove High School, where it becomes Madison Avenue.

At the intersection of Madison Avenue and South Wisconsin Drive, WIS 42 and WIS 32 meet. WIS 32 continues to the northwest on Madison Avenue, while WIS 42 turns north on Wisconsin Drive. WIS 42 continues north out of Howards Grove into Manitowoc County.

WIS 42 continues to the north towards the city of Manitowoc, where it intersects with US 151 (Calumet Avenue), just west of I-43. Turning east, WIS 42 runs concurrently with US 151 for about a quarter mile (0.4 km) before turning onto I-43 at exit 149. WIS 42 formerly ran east beyond the interchange with I-43 to South Rapids Road, following the road to the north to Waldo Boulevard and US 10 on the north side of Manitowoc. WIS 42 now runs north on I-43 to its interchange with CTH-JJ (exit 152).

WIS 42 and US 10 follow Waldo Boulevard to the shore of Lake Michigan, running northeast along the shoreline on Memorial Drive out of the city and into Two Rivers.

Crossing the West Twin River near its confluence with the East Twin River just south of downtown Two Rivers, WIS 42 becomes Washington Street. Two blocks north, it meets the eastern terminus of WIS 310 at 16th Street. Six blocks north, it meets the eastern terminus of WIS 147 at 22nd Street.

WIS 42 turns to the east on 22nd Street and crosses over the East Twin River, then turns north on Lincoln Avenue. WIS 42 and WIS 147 are the only two state highways that cross both branches of the Twin Rivers, though WIS 147 does not cross the West Twin River until about a mile east of its terminus with I-43 near Maribel.

WIS 42 continues to the north, running roughly parallel to the Lake Michigan shoreline into Kewaunee County. Just south of the city of Kewaunee, WIS 42 turns east on Krok Road to Lakeshore Drive, where it turns north and heads into the city as Milwaukee Street.

In downtown Kewaunee, WIS 42 meets the eastern terminus of another state highway, WIS 29. WIS 42 becomes Main Street after crossing the Kewaunee River and continues north out of the city.

In the unincorporated town of Alaska, WIS 42 again turns east towards Lake Michigan to follow the shoreline into Algoma as Lake Street. In downtown Algoma, WIS 42 turns north onto 4th Street and crosses the Ahnapee River. On the north bank of the river, WIS 42 turns northwest onto North Water Street and follows the river in a northerly direction to Forestville in Door County, where it becomes Forestville Avenue.

Door County[edit]

Curvy section near northern terminus
Northern terminus

Because of the geographical features and terrain of Door County, WIS 42 makes many abrupt turns as it nears its northern terminus at the tip of the Door Peninsula.

At its intersection with CTH-J, WIS 42 heads directly north into Door County. WIS 42 meets with WIS 57 a few miles southwest of Sturgeon Bay, and heads to the northeast with WIS 57 into the city as Green Bay Road. WIS 42 and WIS 57 are the only two state highways to enter Door County.

WIS 42/WIS 57 crosses over the Sturgeon Bay Ship Canal to the southeast of downtown, bypassing the old Michigan Street bridge further upstream. A business route continues north on Green Bay Road to South Madison Avenue, crossing the canal on the Michigan Street bridge into downtown Sturgeon Bay. Turning left to the northwest on Third Avenue, the business route follows CTH-B to Jefferson Street, turning to the northeast on CTH-HH. CTH-HH jogs slightly north around Big Hill Park to Egg Harbor Road, where the business route turns northeast past the Door County Fairgrounds to its intersection with WIS 42/WIS 57 outside the city.

WIS 42 and 57 run concurrently for another mile to the north until WIS 57 turns to the East at Johns Lane. WIS 57 runs along the eastern shore of Door County until reaching its eastern terminus with WIS 42 in Sister Bay.

WIS 42 continues north on Egg Harbor Road to CTH-T just west of Egg Harbor. It then swings around and along the shore of Egg Harbor before continuing to the northeast towards Fish Creek.

Outside of Fish Creek, WIS 42 takes an abrupt left-hand turn to follow the bluff down to Main Street and the Alexander Noble House. WIS 42 makes an abrupt right onto Main Street and heads to the northeast past Peninsula State Park into the unincorporated town of Eagle Harbor.

In Eagle Harbor, the road becomes Water Street as it runs along the shoreline of Green Bay. It then curves to the northeast, becoming South Bay Shore Drive outside of Sister Bay. Meeting the northern terminus of WIS 57 at Gateway Drive, WIS 42 once again swings to the northeast towards Ellison Bay.

Just outside town, WIS 42 turns due east on School Road to its intersection with Europe Bay Road, where it turns north towards Gills Rock. At Gills Rock, WIS 42 turns due east and then turns slightly to the southeast before heading due east again to its eastern terminus at the Washington Island Ferry dock at Port Des Morts Drive in unincorporated town of Northport.

Major intersections[edit]

SheboyganSheboygan0.000.00 WIS 23 / WIS 28Southern terminus
Town of Sheboygan3.435.52 I-43 – Green Bay, MilwaukeeExit 128 on I-43
Howards Grove7.5312.12 WIS 32
ManitowocManitowoc26.1842.13 US 151 south – Fond du LacWestern end of US 151 concurrency
I-43 south – Milwaukee

US 151 north / Bus. WIS 42 north – Manitowoc
Southern end of I-43 concurrency; western end of US 151 concurrency; exit 149 on I-43; southern terminus of Bus. WIS 42
US 10 west – Appleton
I-43 north – Green Bay
Western end of US 10 concurrency; northern end of I-43 concurrency; exit 152 on I-43
US 10 east / Bus. WIS 42 south – Manitowoc
Eastern end of US 10 concurrency; northern terminus of Bus. WIS 42
Two Rivers38.5261.99 WIS 310 westEastern terminus of WIS 310
38.9262.64 WIS 147 northSouthern terminus of WIS 147
KewauneeKewaunee62.20100.10 WIS 29 west – Green BayEastern terminus of WIS 29
Algoma73.56118.38 WIS 54 west (Jefferson Street) – Green BayEastern terminus of WIS 54
DoorTown of Nasewaupee86.66139.47 WIS 57 south – Green BaySouthwestern end of WIS 57 concurrency
Sturgeon Bay91.86147.83
Bus. WIS 42 north / Bus. WIS 57 north (Green Bay Road)
Southern end of Bus. WIS 42/Bus. WIS 57
Town of Sevastopol96.23154.87
Bus. WIS 42 south / Bus. WIS 57 south (Egg Harbor Road)
Northern end of Bus. WIS 42/Bus. WIS 57
97.54156.98 WIS 57 northNortheastern end of WIS 57 concurrency
Sister Bay125.32201.68 WIS 57 south – Sturgeon BayNorthern terminus of WIS 57
Gills Rock135.62218.26
Spur WIS 42
To passenger ferry
Northport137.86221.86Ferry dock to Washington IslandNorthern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Related highways[edit]

Manitowoc business route[edit]

Sturgeon Bay business route[edit]

Gills Rock spur route[edit]

Spur WIS 42 is a connecting route between WIS 42 and the Island Clipper ferry in Gills Rock. The length of the spur is approximately 0.10 miles (160 m),[1] the shortest highway in the Wisconsin state trunk highway system. The spur is one of three SPUR-designated state trunkline highways in the state along with Spur US 51 and Spur WIS 794. The Gills Rock ferry is a passenger-only ferry, where the one at Northport is an auto, freight and passenger ferry.


  1. ^ a b c Region 3 Staff (May 14, 2009). State Trunk Highway Log for Region 3. Green Bay, WI: Wisconsin Department of Transportation. pp. 253–276, 656.

External links[edit]