The roadway that SH 11 follows was first added to the state highway system in 1932-1934 as a northerly extension of State Highway 51 (1923-1968)|State Highway 51]. However, instead of skirting the western edge of Julesburg, SH 51 crossed US 138 on Cedar Street and then zigzagged on Fifth, Sycamore, and Ninth Streets to current SH 11 about north of US 138. The state eliminated many state highways in 1953, including this extension of SH 51 north of Julesburg. In 1970-1971 the road was returned to the state highway system as SH 11.