Arizona is one of the Four Corners states. It borders New Mexico, Utah, Nevada, California, touches Colorado, and has a 389 mi (626 km) international border with the states of Sonora and Baja California in Mexico. Aside from the Grand Canyon, many other National Forests, Parks, Monuments, and Indian reservations are located in the state. Arizona was the 48th and last of the contiguous states admitted to the Union on February 14, 1912. Residents are called Arizonans.