 The early 1920s saw WIS 24 extended southwestward along the present day route of US 63 to Turtle Lake then to New Richmond along WIS 64 and southwest to Hudson.When US 63 was opened WIS 24 was removed from the books.Highway 24 used to continue southwest through Waukesha, Racine and Walworth Counties to Highway 20 in East Troy, but was turned over to local control and redesignated as County Highway L in the late 1980s.