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Wisconsin Highway 73

State Trunk Highway 73 marker

State Trunk Highway 73
Route information
Maintained by WisDOT
Length: 265.84 mi (427.83 km)
Major junctions
South end: I-39 / I-90 / US 51 in Edgerton
  US 12 / US 18 in Deerfield
I-94 in Deerfield
US 151 in Columbus
I-39 / US 51 in Plainfield
US 10 in Neillsville
North end: US 8 in Ingram
Location
Counties: Dane, Columbia, Dodge, Green Lake, Marquette, Waushara, Adams, Portage, Wood, Clark, Taylor, Rusk
Highway system
WIS 72 WIS 74

State Trunk Highway 73 marker

State Trunk Highway 73 (often called Highway 73, STH 73 or WIS 73) is a state highway in the U.S. state of Wisconsin. It runs north–south across central Wisconsin from Ingram to near Edgerton, with the exception of Wood and Adams counties, where this route runs east–west. It is one of the longer Wisconsin state highways at 265.8 miles.

WIS 73 starts in Dane County at an interchange with Interstate 39, Interstate 90 (Exit 160), US 51 north of the city of Edgerton. US 51 South goes into Edgerton. Also near this junction, WIS 106 meets WIS 73 east of Albion. 73 heads north 9 miles to US 12 and US 18. After a brief cosigning heading west, 73 splits north and heads 1 mile to Deerfield. About 4 miles north of Deerfield, it meets Interstate 94 at Exit 250, and continues north another 4 miles to Marshall where it has a brief cosigning with WIS 19.

It continues north about 10 miles to the city of Columbus. Just before it goes under an overpass of US 151, it crosses into Columbia County. 73 crosses US 151, WIS 89, WIS 16 & WIS 60 and US 151 again, in that order, as it travels northeast through Columbus on Park Avenue and Ludington Street. It also crosses into Dodge County just after WIS 16 & 60.


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