421st Avenue in Spring Valley Township, Clark County, South Dakota

421st Avenue in Clark County is a gravel local road. It runs in a north-south direction starting from 158th Street and crosses 160th Street, 161st Street, 162nd Street, 164th Street, 165th Street, 166th Street, 168th Street, 169th Street, 171st Street, 172nd Street and 174th Street. It connects Garfield Township, Lincoln Township, Spring Valley Township and Woodland Township. This street is part of the highway "2". 421st Avenue also exists in Rosedale Township and Darlington Township.