Location and geography
Phoenix is located in middle of Arizona, in the heart of the Sonoran desert, one of the largest deserts in the Eastern Hemisphere. Phoenix is the most populous city in Arizona, and the sixth most populous city in America, with over 1.45 million inhabitants. The city covers 1,338 sq. km/516 sq. miles, and is located in a valley surrounded by mountain ranges. Therefore, the topography is flat, helping the streets run on a grid formation.
Arizona is located in the Southwestern region of the United States. Phoenix is a valley city encircled by the Sierra Estrella mountain range to the southwest, the McDowell Mountains to the northeast, the Superstition Mountains to the east, and the White Tank Mountains to the west. Hence, the Phoenix metropolitan area is said to be the Valley of the Sun. The Salt River runs through the valley. However, the river contains little water due to the area's irrigation controls. Several Indian reservations abut the outskirts of the city.