unknown; however, these were used by Kelley to establish occupation periods and site characterization. A proposed occupation between 800 and 1450 CE, was established, and its possible affiliation with the Chalchihuites culture, Guadiana branch. After Kelley research, the site was abandoned by the authorities for 40 years, with the consequent destruction and looting by professional dealers of archaeological pieces. Since 1993 there have been a few sporadic investigations. The Site The site has traces of at least two human groups occupation in the past, a nomad group that inhabited the site originally and a second group, sedentary, that built the larger structures on the hill. The site occupation is related to Chalchihuites culture, that had its most important site in Altavista in the Zacatecas state, formed part of a branch called Guadiana, that reached up to El Zape, in the north of the state. The cultural group that inhabited La Ferrería basically subsisted farming corn, beans and squash, and were hunter-gatherers. Structures There are important archaeological complexes, among them: circular ritual spaces, eastern pyramidal structure, ballgame court, columns and sunken patios. Casa de la estructuras escalonadas The "stepped structures house" is a small set with a sunken patio, characteristic detailed of prehispanic construction in the region; there are platforms on three sides of the patio, built with stone and clay, probably as a foundation of other ancient structures. Grinding activities were conducted in this area. Casa de los dirigentes It is thought that the “Governor’s House” structure had residential uses, has a sunken patio carved in large rocks. There are remains of buildings perimeter as well as original drains. Just as other structures, platforms surround it, probably foundations of houses made with tree trunk columns and grass roofs. These buildings are adjacent to the columns hall and the small house. Sala de las columnas The “columns hall” are remnants of a small platform made of stone with large cylindrical columns, probably a meeting place, possibly ritual character. Casa colonial The “colonial house” is next to the columns hall, are the foundations of a small, rustic house possibly colonial; It is a single room house, with evidence of metal foundry. Casa con piso de piedra The “house with stone floors” is located at the top, it is necessary to climb the hill over an original pathway. There are two fixed mortars, probably from a nomadic group occupation, possibly reused by the