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
Stikine Ranges the Yukon boundary, adjacent to the Nisutlin Plateau at c. , to the Finlay River at c. . Stikine Ranges The Stikine Ranges are a group of mountain ranges and mountainous plateaus in northwestern British Columbia, Canada. They are the northernmost subdivision of the Cassiar Mountains and among the least explored and most undeveloped parts of the province. The Sifton Ranges, which are also part of the Cassiar Mountains, lie immediately east of the Stikine Ranges just north of the Finlay River; northwest of there the larger Kechika Ranges lie between the Stikine Ranges and the Rocky Mountain Trench. The