State Trunk Highway 78 | ||||
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Route information | ||||
Maintained by WisDOT | ||||
Length: | 92.83 mi (149.40 km) | |||
Major junctions | ||||
South end: | IL 78 in Gratiot | |||
US 18 / US 151 in Mt. Horeb US 14 in Black Earth US 14 / WIS 19 in Mazomanie US 12 / WIS 60 in Sauk City |
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North end: | I-39 / I-90 / I-94 in Portage | |||
Location | ||||
Counties: | Lafayette, Iowa, Green, Dane, Sauk, Columbia | |||
Highway system | ||||
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State Trunk Highway 78 (often called Highway 78, STH 78 or WIS 78) is a state highway in the U.S. state of Wisconsin. It runs north–south in south central Wisconsin from Portage to the Illinois border near Gratiot.
Historical note: In the 1920s, Highway 78 was originally located on the Door County Peninsula on what is now Highway 57.