State Trunk Highway 171 is a state highway in the U.S. state of Wisconsin. It runs east–west in southwest Wisconsin from near Ferryville to Boaz. A section of the route was initially designated as WIS 131 in 1924, but it was not signed as WIS 171 until sometime between 1948 and 1956, when the highway was extended east to US 14 near Boaz.

State Trunk Highway 35 is a Wisconsin state highway running north–south across western Wisconsin. It is 412.15 miles in length, and is the longest state highway in Wisconsin. Portions of WIS 35 are part of the Great River Road.