Colorado Constitution of 1876 § 2. Boundaries

That the said state of Colorado shall consist of all the territory included within the following boundaries, to-wit: commencing on the thirty-seventh parallel of north latitude where the twenty-fifth meridian of longitude west from Washington crosses the same; thence north, on same meridian, to the forty-first parallel of north latitude; thence along said parallel west to the thirty-second meridian of longitude west from Washington; thence south on said meridian, to the thirty-seventh parallel of north latitude; thence along said thirty-seventh parallel of north latitude to the place of beginning.