Sierra Madre Occidental Sierra Madre Occidental The Sierra Madre Occidental is a major mountain range system of the North American Cordillera, that runs northwest–southeast through Northwestern and Western Mexico, and along the Gulf of California. The Sierra Madre is part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, Central America, South America and Antarctica. The Spanish name "sierra madre" means "mother mountains" and "occidental" means "western" in English, with these being the "Western Mother Mountains". To the east, from the Spanish "oriental" meaning
Socorro County, New Mexico the top of South Baldy peak in the Magdalena Mountains. The southern portion of the Rocky Mountains extend into New Mexico and Socorro County. There are several mountain ranges that spread throughout the county. The Forest Service manages portions of four mountain ranges: the Bear, Datil, Magdalena, and San Mateo Mountains. Most of the land that comprises these mountains are within the Cibola National Forest. These ranges, as well as Ladron Peak located in Socorro County, are classified as sky islands. As of the 2000 census, there were 18,078 people, 6,675 households, and 4,492 families residing in the county. The