New Mexico Statutes Chapter 4. Counties § 4-21-2. Eastern boundary

That the dividing line between the counties of Taos and Rio Arriba shall be changed so as to read as follows: the same shall be a straight line from the point where the present dividing line between said counties crosses the Rio Grande; thence to the north side of the house known as that of Antonio Domingo Lucero, deceased; thence west, crossing the Ojo Caliente river, to the summit of the Hot Springs mountains; and thence north to the junction of the Canada de los Comanches with the Ojo Caliente river, and thence following the wagon road to the crossing of the Tres Piedras arroyo west of the house of Juan Estevan Rodriguez, deceased, at the town of Tres Piedras; thence running west with said arroyo for a distance of one mile; thence north for a distance of one mile; thence east to the present dividing line of said counties; and thence to the southern boundary of the state of Colorado. Provided, that this will not affect any litigation now pending in said counties of Rio Arriba and Taos February 20th, 1905.