Colo. Rev. Stat. § 30-5-139
Beginning at the intersection of the first standard parallel north with the east line of range sixty-eight west; thence west on said parallel to its intersection with the east line of range sixty-nine west; thence south on said range line to its intersection with the south line of township four north; thence west on said township line to its intersection with the continental divide; thence northwesterly on the continental divide to the point where it intersects the Medicine Bow Mountains; thence northwesterly along the crest of the Medicine Bow Mountains to its intersection with the north boundary line of Colorado; thence east on said north boundary line to its intersection with the east line of range sixty-eight west; and thence south to the place of beginning. Said public land survey lines are based upon the sixth principal meridian.
C.R.S. § 30-5-139