It was originally a short spur route into Marcus, but was extended north to Iowa 10 in 1938.

Heading north through Marcus along Ames Street, the highway passes a municipal golf course, cemetery, and high school.

The residential area of Marcus ends abruptly at a Chicago Central and Pacific Railroad line on the northern edge of town.

[4] Two miles (3.2 km) before the northern end of the highway, it intersects CR B60, which leads to Germantown.

75) when the Primary Highway System was created in 1920; it was a short spur route that connected No.