Southwestern United States

The Southwestern United States (also known as the American Southwest) is a region of the United States which includes Arizona, the western portion of New Mexico, bordered on the east by the Llano Estacado, southern Colorado and Utah below the 39th parallel, the "horn" of Texas below New Mexico, the southernmost triangle of Nevada, and the most southeastern portion of California, which encompasses the Mojave and Colorado Deserts.

Southwestern United States

The Southwestern United States (also known as the American Southwest) is a region of the United States which includes Arizona, the western portion of New Mexico, bordered on the east by the Llano Estacado, southern Colorado and Utah below the 39th parallel, the "horn" of Texas below New Mexico, the southernmost triangle of Nevada, and the most southeastern portion of California, which encompasses the Mojave and Colorado Deserts.