SDCL § 31-4-178: State Highway 79 from U.S. Highway 18 to North Dakota.

The state trunk highway system includes the following in Fall River, Custer, Pennington, Meade, Butte, and Harding counties:

(1) From a point on U.S. Highway 18 southeast of Hot Springs northerly via Rapid City to the intersection of U.S. Highway 16B;

(2) From a point on State Highway 34 east of Sturgis north to U.S. Highway 212 south of Newell;

(3) From a point on U.S. Highway 212 in Newell northerly to State Highway 20;

(4) From a point on State Highway 20 east of Buffalo north to the North Dakota state line.