SDCL § 7-1-44: McCook County boundaries.

Beginning at the northeast corner of township one hundred four north of range fifty-three west of the fifth principal meridian, thence west and along the first standard parallel north, to the northwest corner of township one hundred four north of range fifty-six west; thence south and along the range line between ranges fifty-six and fifty-seven west, to the southwest corner of township one hundred one north of range fifty-six west; thence east and along the base line to the southeast corner of township one hundred one north of range fifty-three west; thence north and along the range line between ranges fifty-two and fifty-three west, to the place of beginning.