 The highway then angles northeastward over the remaining seven miles (11 km) before entering Winnebago County Four more miles into the county the route terminates at its interchange with Interstate 41/US 41 on the far southwest side of Oshkosh, about two miles (3 km) south of the Wittman Regional Airport, site of EAA AirVenture Oshkosh.The original 1917 alignment of WIS 26 mostly followed the current alignment south of Juneau, but the segment north of Juneau was directed towards Theresa.1921 saw WIS 26 extended via Kewaskum and Waldo to end at Sheboygan - via present-day Wisconsin Highway 28.