Prominent features on a map of Arizona are the Grand Canyon, the Colorado River and the Sonoran Desert. Additionally, the Colorado Plateau in the northeast part of the state contains some noteworthy features, such as the Black Mesa, the Painted Desert and Monument Valley. Humphreys Peak, the highest mountain in Arizona, is also located in the Colorado Plateau.
The Grand Canyon is located in the northern part of Arizona, and its prominence on the map is due to its size. It is 277 miles long, up to 18 miles wide and 1 mile deep. Geologists estimate that it is over 5 million years old. Part of the Colorado River runs through the Grand Canyon.
The Colorado River is Arizona's largest river, and it forms part of the state's border with California and Nevada. The Little Colorado River, located in the eastern part of the state, is its main tributary. Other prominent Arizona rivers are the Gila, Salt and Verde Rivers.
The Gila River runs through the Sonoran Desert, situated in southwest Arizona. Unlike the Painted Desert in the north, the Sonoran Desert is located in a low elevation area away from the mountain ranges. The three prominent mountain ranges in Arizona are the Galiuro Mountains, the Gila Mountains and the Chuska Mountains.