SDCL § 31-4-177: State Highway 75 from State Highway 20 to North Dakota.

The state trunk highway system includes the following in Perkins County:

From a point on State Highway 20 west of Bison near the southwest corner of section ten, township eighteen north, range twelve east, thence north to the North Dakota state line near the northwest corner of section twenty-one, township twenty-three north, range twelve east.