S.D. Codified Laws § 41-17-12 (2026)
No highways, roads, or trails may be built in any state park except such as are designated by the Game, Fish and Parks Commission. A violation of this section is a Class 2 misdemeanor.
Source: SDC Supp 1960, § 25.1318 as enacted by SL 1966, ch 73 , § 2; SL 1991, ch 337 , § 87.