 WIS 21 then returned to the present corridor route to pass through Coloma, Wautoma, Omro and into Oshkosh.The route from La Crosse to New Lisbon was removed in the early 1920s and extended along its current alignment through Wyeville to North Tomah.The highway was rerouted in Adams County to become more direct between Arkdale and CTH-G in 1939.