The state trunk highway system includes the following in Oglala Lakota County:

From a point on the Nebraska state line south of Pine Ridge near the northeast corner of section twenty-four, township thirty-five north, range forty-five west, thence north to U.S. Highway 18 in section twelve, township thirty-five north, range forty-five west.

Source: SL 1984, ch 209, § 110; SL 2015, ch 56 (HJR 1005), eff. May 1, 2015.