Arizona (Navajo: Hoozdo Hahoodzo; O'odham: Alĭ ṣonak) is a state in the southwestern region of
Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. It was previously part of the territory of Alta California in New Spain before being passed down to independent Mexico and later ceded to the United States after the Mexican–American War. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase.
Arizona is noted for its desert climate in its southern half, with very hot summers and mild winters. The northern half of the state features forests of pine, Douglas fir, and spruce trees; the Colorado Plateau; some mountain ranges (such as the San Francisco Mountains); as well as large, deep canyons, with much more moderate summer temperatures and significant winter snowfalls. There are ski resorts in the areas of Flagstaff, Alpine, and Tucson. In addition to the Grand Canyon National Park, there are several national forests, national parks, and national monuments. About one-quarter of the state is made up of Indian Reservations that serve as the home of a number of Native American tribes.