WIS 26 begins in downtown Janesville, Rock County at U.S. Highway 51 (US 51, North Parker Drive), and follows East Centerway Street, to turn northeast on Milton Ave. WIS 26 crosses US 14 and Interstate 39/Interstate 90 (I-39/I-90) on the northeast side of the city.
WIS 26 starts in downtown Janesville, Rock County at U.S. Highway 51 (US 51, North Parker Drive), and then travels east on Centerway Street before turning northeast onto Milton Avenue. WIS 26 crosses US 14 and Interstate 39/Interstate 90 (I-39/I-90) on the city's northeast side.