Route 13 is a highway in Missouri which runs almost the entire north–south length of the state. Its northern terminus is at U.S. Route 69/136 in Bethany. Its southern terminus is at the Arkansas state line in downtown Blue Eye, Missouri–Arkansas where it continues as Highway 21. It is one of the original state highways of Missouri. In 2006 the portion through Caldwell County, Missouri was named the Zack Wheat Memorial Highway in honor of the Baseball Hall of Fame player.[1]