The route forms the main street for Richfield and spans 3.89 miles (6.26 km).

From there, the route heads east on 1200 South, a four-lane undivided highway, in the southwestern portion of Richfield.

Past 900 South, the road straightens out to the north and reaches central Richfield.

The route and Main Street terminate at another diamond interchange with I-70, this time at exit 40.

The proposed roads were completed in 1990, with the overlapping portion of US 89 along Main Street rerouted onto I-70 in 1992.