Colo. Rev. Stat. § 30-5-122
So much of the county of Douglas as is included in the following described boundaries shall be set apart and is hereby established with the same legal capacity and functions as other counties of this state, to be called Elbert county:
Beginning at a point where the center of range sixty-five west intersects the first correction line south; thence east on said correction line to the eastern boundary of the state; thence south on said eastern boundary line to the line between townships thirteen and fourteen south; thence west on said line to the line between ranges fifty-nine and sixty west; thence north on said last mentioned line to the second correction line south; thence west on said second correction line to the center of range sixty-five west; thence north through the center of range sixty-five to the place of beginning.
C.R.S. § 30-5-122