The Sierra Estrella is a mountain range located southwest of Phoenix, Arizona. Much of the range falls within the Gila River Indian Reservation, but 14,400 acres of BLM land is protected as the Sierra Estrella Wilderness. The Sierra Estrellas were inhabited by the Akimel O'odham people and also some Yavapai bands at the north end of the range at the time of Spanish colonization, and today the mountains tower over several of the Akimel O'odham and Maricopa villages of the Gila River Indian Community