Identification. The Guarijío are a semidispersed group of Indians living in the mountains of the state of Sonora, Mexico. They are subsistence farmers with a native political organization based primarily on religious festivals. They are located between the Mayo to the west and the Tarahumara to east.
Location. The Guarijío live in the municipios of Quiriego and Alamos Sonora in the state of Sonora. They inhabit mountainous areas, ravines, and the Valley of the Alto Río Mayo. The Guarijío communities are Guajaray, San Bernardo, Sejaqui, Burapaco, Mochibampo, Mesa Colorada, and Bavícora. Their lands extend from 26°31′ to 28°20′ N and from 107°00′ to 108°37′ W.
According to Köppen's classification, the area's climate is of the BSHW type, that is, dry with moderate rainfall in the summer and a mean annual temperature greater than 18° C. The highest recorded temperature is 40.5° C, indicating high thermal instability and extreme variation.
Demography. In such eroded terrain, without natural or cultural resources to attract people, isolated from communication routes, and at great distances from important production and distribution centers, population growth is slow. The 1990 census recorded 1,190 Guarijío in Sonora.
Linguistic Affiliation. The Guarijío language belongs to the Taracahitan Branch of the Uto-Aztecan Language Family. Their language is most closely related to Tarahumaran.