Northern Arizona is an unofficial, colloquially-defined region of the U.S. state of Arizona. It is dominated by the Colorado Plateau, the southern border of which in Arizona is called the Mogollon Rim. In the West lies the Grand Canyon, which was cut by the flow of the Colorado River while the land slowly rose around it. In the central portion lies the Painted Desert, consisting of sedimentary rocks eroded by water and wind, exposing thick, brightly colored layers. In the East are the very large Hopi and Navajo reservations, parts of which overlap, leading to occasional territorial disputes. In this area travelers may tune their radios to hear native-language broadcasts. Flagstaff is the largest and main city of the Northern Arizona region. Kingman, located in the northwest of the state, in Mohave County, may or may not be considered part of Northern Arizona, depending on local opinions. Flagstaff is home to Northern Arizona University and the Lowell Observatory. Much of the territory is parkland, reservations, or other BLM-administered lands. Major attractions in addition to the Grand Canyon include the cliff dwellings of Canyon de Chelly, and Meteor Crater. Northern Arizona also goes by the name Alta Arizona, which means "Upper Arizona" in Spanish.
The following National Monuments are located in Northern Arizona: