|Maintained by WisDOT|
|Length||137.86 mi (221.86 km)|
|Lake Michigan Circle Tour|
|South end||WIS 23 / WIS 28 in Sheboygan|
|North end||Washington Island Ferry Dock in Northport|
|Counties||Sheboygan, Manitowoc, Kewaunee, Door|
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.
Sheboygan County through Kewaunee County
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. Because there are only two exits in the 20 miles (32 km) between WIS 42's junctions with I-43 in Sheboygan and Manitowoc, it also serves as the state-designated Alternate Interstate 43 (along with the roads from those two exits from WIS 42) when road incidents close Interstate 43 proper.
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).
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 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.
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 in Forestville, WIS 42 heads directly north into Door County. In the unincorporated community Maplewood, Wisconsin, there is a small wayside park with parking, vault toilets and picnic tables in the center of town at the intersection of WIS 42, County Trunk H, and the Ahnapee State Trail. The wayside park is open a half hour before sunrise to 11 PM, although the trail is open all 24 hours. This is the only place where the trail crosses WIS 42.
Past Maplewood, 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.
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.
|Sheboygan||Sheboygan||0.00||0.00||WIS 23 west / WIS 28 west / LMCT (Erie Ave)||Southern terminus|
|Town of Sheboygan||3.43||5.52||I-43 / LMCT – Milwaukee, Green Bay||Exit 128 on I-43|
|Howards Grove||7.53||12.12||WIS 32 – Sheboygan Falls, Kiel|
|Manitowoc||Manitowoc||26.18||42.13||US 151 south – Chilton, Fond du Lac||Western end of US 151 concurrency|
| I-43 south / LMCT – Milwaukee|
US 151 north / Bus. WIS 42 north / LMCT – 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 / I-43 north – Green Bay, Appleton||Western end of US 10 concurrency; northern end of I-43 concurrency; exit 152 on I-43|
US 10 east / Bus. WIS 42 south / LMCT – Manitowoc
|Eastern end of US 10 concurrency; northern terminus of Bus. WIS 42|
|Two Rivers||38.52||61.99||WIS 310 west (16th St)||Eastern terminus of WIS 310|
|38.92||62.64||WIS 147 north (22nd St) – Mishicot||Southern terminus of WIS 147|
|Kewaunee||Kewaunee||62.20||100.10||WIS 29 west – Green Bay||Eastern terminus of WIS 29|
|Algoma||73.56||118.38||WIS 54 west (Jefferson Street) – Green Bay||Eastern terminus of WIS 54|
|Door||Town of Nasewaupee||86.66||139.47||WIS 57 south / LMCT – Green Bay||Southwestern end of WIS 57 concurrency|
Bus. WIS 42 north / Bus. WIS 57 north (Green Bay Road)
|Southern end of Bus. WIS 42/Bus. WIS 57|
|Town of Sevastopol||96.23||154.87|
Bus. WIS 42 south / Bus. WIS 57 south (Egg Harbor Road)
|Northern end of Bus. WIS 42/Bus. WIS 57|
|97.54||156.98||WIS 57 north / LMCT – Jacksonport, Baileys Harbor||Northeastern end of WIS 57 concurrency|
|Sister Bay||125.32||201.68||WIS 57 south / LMCT – Baileys Harbor, Sturgeon Bay||Northern terminus of WIS 57|
Spur WIS 42
|To passenger ferry|
|Northport||137.86||221.86||Ferry dock to Washington Island||Northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
Manitowoc business route
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Sturgeon Bay business route
Gills Rock spur route
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), 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.
- Door County Coastal Byway (WIS 42 and 57 north of Sturgeon Bay to Northport is classified as a Coastal Byway)
- Media related to Wisconsin Highway 42 at Wikimedia Commons