La Pintada is an archaeological site located some 60 kilometers south of the city of Hermosillo, Sonora, Mexico, within the "La Pintada" canyon, part of the "Sierra Libre", a small mountain massif of the coastal plains that extends throughout the Sonoran Desert.

La Pintada, a forgotten archaeological treasure, is an important archaeological zone of its kind in the state of Sonora. It offers visitors a glimpse of the ancestral cultural legacy as well as a view of its natural flora, fauna and orography.

The groups that lived here depended for survival on both; their knowledge of the territory and the availability of resources, and especially water. Their scarcity in a desert environment makes the places where water abounds in nodal points of territory. Hence, the "Sierra Libre"stands as an authentic oasis, it contains many natural water deposits, and the liquid abundance is reflected in the quantity and quality of available resources. Several containers in the La Pintada Canyon are filled during the summer rains and refilled with winter rains.

It was a spot where, according to some experts, native groups, such as Seris, Pimas or Yaquis, during their last years would hide from the Spaniards conquering weapons. It is also known as "Macizo del Cerro Prieto", "Sierra Libre" or "Sierra Prieta". Caves, hollows and rocks from this area were used by ancient natives as dwellings, funerary events and sanctuaries.

The site is located within regional areas defined as AridoamericaAridoamerica is also known as the Gran Chichimeca. Gran Chichimeca is a term used by Mexican archaeologists to describe a region of the southwestern United States and the northern and central regions of Mexico, in contrast to Mesoamerica, which lies to the south and east. Some archaeologists even delineate a third buffer zone, Oasisamerica.Cordell and Fowler 85 and Oasisamerica.Oasisamerica was a broad cultural area in pre-Columbian southwestern North America. It extended from modern-day Utah down to southern Chihuahua, and from the coast on the Gulf of California eastward to the Río Bravo river valley. Its name comes from its position in relationship with the similar regions of Mesoamerica and nomadic Aridoamerica. Both are defined as independent of Mesoamerica and in turn are apparently differentiated from one another by cultural traits. One group is said to be composed of hunter-gatherers and the other to be in possession of agricultural techniques.

No information is available as to what the chronological periods are for each "region" was, as both cover about the same territories, nor their relation with other Mesoamerican native cultures in Mexico.

Background Evidence of human existence in the state dates back over 10,000 years, with some of the best known remains at the San Dieguito complex in the El Pinacate Desert. The first humans were nomadic hunter gatherers and used stone, seashell and wooden tools.Gonzalez, pp. 36–37Foster, p. 242 In much of the prehistoric period, the environmental conditions were less severe than they are today. Vegetation was similar, but its distribution was wider and denser.Foster, p. 243

Agriculture first appears around 400 BCE and 200 CE in the river valleys. Ceramics developed after 750 CE and would diversity between 800 CE and 1350 CE. Between 1100 and 1350, the region had small but somewhat socially complex villages, which were involved in well-developed trade networks. One exception to this was the lowland central coast which never truly adopted agriculture. As noted, Sonora and much of the northwest is not considered to be part of Mesoamerica, with Guasave in Sinaloa the most northwestern Mesoamerican settlement known, but there is evidence of trade between the peoples of Sonora and Mesoamerica.Foster, p. 150

Three cultures developed in the low flat areas of the state near the coast called the Trincheras tradition, the Huatabampo tradition and the Central Coast tradition.

The Trincheras tradition is dated to between 750 and 1450 CE and mostly known from sites in the Altar, Magdalena and Concepción valleys, but their range extended from the Gulf of California into northern Sonora.

The tradition is named after trenches found in a number of sites, the best known of which is the Cerro de Trincheras.

The Huatabampo tradition is centered south of the Trincheras on the coast, with sites along extinct lagoons, estuaries and river valleys. The pottery is distinctive. The culture shows similarities with the Chametla to the south and the Hohokam to the north. It probably disappeared around 1000 CE. Unlike the other two tradition, the Central Coast remained a hunter-gatherer culture, as the area lacks the resources for agriculture.Foster, p. 18

The higher elevations of the state were dominated by the Río Sonora and Casas Grandes traditions. The Río Sonora culture is located in central Sonora from the border area to modern Sinaloa. A beginning date for this culture has not been determined but it probably disappeared by the early 1300s. The Casas Grandes tradition in Sonora was an extension of that based in the modern state of Chihuahua, and these people exerted their influence down to parts of the Sonoran coast.Foster, p. 19Foster, p. 251

Climatic changes in the middle of the 15th century resulted in the increased desertification of Sonora and northwest Mexico in general. This is the probable cause for the drastic decrease in the number and size of settlements starting around this time. Those peoples who remained in the area reverted to a less complex social organization and lifestyle.Foster, p. 252 Whatever socially complex organization which existed in Sonora before the Spanish, was long gone by the 16th century.

The story of the origins of the cultural super area of Mesoamerica takes place some 2000 years after the separation of Mesoamerica and Aridoamerica. Some of the Aridoamerican communities farmed as a complement to their hunter-gatherer economy. Those communities, among whom one finds adherents to the Desert Tradition, later would become more truly agricultural and form Oasisamerica. The process of introducing agriculture in the desert-like land of northern Mexico and the southern United States was gradual and extensive: by the year 600 CE (a time which coincides with the twilight of Teotihuacan), several groups had already acquired agricultural techniques.

Ancient Cultural Groups Ancient native cultural groups inhabiting the region are the Mayos, the Yaquis and the Seris; however there are a number of other groups which have maintained much of their way of life in territory in which they have lived for centuries.Gonzalez, pp. 23–24

The Mayos, also called the Yoreme, are descendants from the ancient Huatabampo culture. They call themselves "people of the riverbank" as they are concentrated along the Mayo River.

The Yaquis are the ancestral cultural group mostly associated with the state of Sonora.

The Seris call themselves the Conca'ac, which means "the people" in the Seri language. The name Seri comes from the Opata language and means "men of sand."

Generally, the Seris are the tallest of the indigenous peoples of the region, and the first Spanish to encounter them described them as "giants."Gonzalez, pp. 24–25

The Tohono O'odham, still referred to as the Pápago, inhabited the most arid areas of the state, mostly in Caborca, Puerto Peñasco, Sáric, Altar and Plutarco Elías Calles in the north of the state. This group had ethnic relations with groups in Arizona. The Tohono O'odham have as a principle deity the "Older Brother," who dominates the forces of nature.Gonzalez, p. 25

The Opatas inhabited regions in the center and northwest of the state. This group name means "hostile people" and was given to them by the Pimas, as the Opatas were generally in conflict with their neighbors. They were especially hostile to the Tohono O'odham, who they depreciatingly refer to as the Papawi O'otham, or "bean people."Gonzalez, p. 26

The Pimas occupy the mountains of the Sierra Madre Occidental in eastern Sonora and western Chihuahua state. The Pimas call themselves the O'oh, which means "the people." The name Pima was given to them by Spaniards because the word "pima" would be said in response to most questions asked to them in Spanish. This word roughly means "I don't know" or "I don't understand." The traditional territory of this ethnicity is known as the Pimería, and it is divided into two regions: the Pimería Alta and the Pimería Baja.

The Guarijíos are one of the least understood groups in the state, and are mostly restricted to an area called the Mesa del Matapaco in the southeast. The Guarijíos are related to the Tarahumaras and the Cáhitas.

The Cocopah is the smallest native indigenous group to Sonora with only about 170 members, who live mostly in San Luis Río Colorado, along the U.S. border. Their original name Kuapak, means "which comes" and possibly refers to the frequent changes in the course of the Colorado River. There have been efforts to preserve what is left of the Cocopah culture, but only 47 individuals speak the Cocopah language.Gonzalez, p. 27

The Kickapoos are not native to Sonora, but migrated here from the United States over a century ago. Today, they are found in the communities of El Nacimiento, Coahuila and Tamichopa in the municipality of Bacerac. Their ancestral language was part of the Algonquin family.

The Anasazi culture flourished in the region currently known as the Four Corners. The territory was covered by juniper forests which the ancient peoples learned to exploit for their own needs. The Anasazi society is one of the most complex to be found in Oasisamerica, and they are assumed to be the ancestors of the modern Pueblo people (including the Zuñi and Hopi). (The word "Anasazi" is a Navajo term meaning "enemy ancestors"; its neutrality should thus not be blindly assumed.) In contrast to their Anasazi neighbors to the north, the nomadic communities of the Hohokam culture are poorly understood. They occupied the desert-like lands of Arizona and Sonora. The Hohokam territory is bounded by two large rivers, the Colorado and Gila Rivers, that outline the heart of the Sonora Desert. The principal settlements of the Hohokam culture were Snaketown, Casa Grande, Red Mountain, and Pueblo de los Muertos, all of which are to be found in modern-day Arizona. A slightly different branch of the Hohokam people is known as the Trincheras, named after their most well-known site in the Sonora Desert. The Hohokam lived in small communities of several hundred people.

The development of the Hohokam culture is divided into four periods: Pioneer (300 BCE - 550 CE), Colonial (550-900 CE), Sedentary (900-1100 CE), and Classical (1100-1450 CE). The Pioneer period commenced with the construction of the canal works, and the Hohokam constructed semi subterranean dwellings in order to protect themselves from the blistering heat of the Sonoran Desert. In the Colonial period, ties were strengthened with Mesoamerica. Proof of this can be found in the recovery of copper bells, pyrite mirrors, and the construction of ballgame courts juego de pelota, all of which display a very Hohokam touch. The relations with Mesoamerica and the presence of such traded goods indicate that by the Colonial period the Hohokam had already become organized into chiefdoms and centers of power. Relations with Mesoamerica would diminish in the following period, and the Hohokam turned to construct multi-story buildings like Casa Grande, which had four levels.

By the time the Europeans arrived in the Arizona and Sonora Deserts, a region which they named Pimería Alta, the urban centers of the Hohokam had already become abandoned presumably due to the health and ecological disasters that befell the indigenous social system. The inhabitants of the region were called Pápagos, a group which spoke an Uto-Aztecan language.