Northwestern Mexico is a region of Mexico (the United Mexican States) formed by the states of Durango, Sinaloa, Chihuahua, Sonora, Baja California and Baja California Sur. The region is a mountainous area with large desert areas and stunning natural formations like Copper Canyon, Sierra Madre Occidental and Pinacate Peaks; vast deserts such as Gran Desierto de Altar and El Vizcaíno Desert; and it also includes the Gulf of California and the Baja California Peninsula that includes numerous large and small islands like Guadalupe Island, Cedros Island, Tiburón Island and Archangel Island.