The Guachichil, Cuauchichil, or Quauhchichitl, were an Indigenous peoples that occupied the most extensive territory of all the indigenous Chichimeca Nations tribes in pre-Columbian Central Mexico.The Guachichiles roamed through a large region of Zacatecas; as well as portions of San Luis Potosí, Guanajuato, and northeastern Jalisco; south to the northern corners of Michoacán; and north to Saltillo in Coahuila.