Arizona

Arizona is a desert-and-canyon wonderland — hiking and rafting the Grand Canyon's 277 river miles, exploring the red rocks of Sedona, slot canyons like Antelope, and Monument Valley on the Navajo Nation. The San Francisco Peaks and the Mogollon Rim offer cool high-country hiking and skiing.

Stargazing is world-class under some of the clearest, darkest skies in the country.

Spring and fall are ideal across most of the state. The low deserts (Phoenix, Tucson) are best October–April; the high country and Grand Canyon's North Rim are summer destinations, as the desert is dangerously hot in summer (Phoenix routinely tops 110°F).

Saguaro cactus forests shelter javelinas, coyotes, roadrunners, Gila monsters, and rattlesnakes; the 'sky island' mountains host black bears, coatis, and a remarkable diversity of birds (Arizona is a top U.S. birding state), and California condors soar over the Grand Canyon and Vermilion Cliffs.

Arizona spans the Sonoran and Chihuahuan deserts, the world's largest contiguous ponderosa-pine forest along the Mogollon Rim, and isolated 'sky island' ranges of extraordinary biodiversity where temperate and tropical species meet.

The Colorado Plateau exposes nearly 2 billion years of rock in the mile-deep Grand Canyon, while the Basin and Range, the volcanic San Francisco Peaks (12,633-ft Humphreys Peak is the state high point), Meteor Crater, and the Sonoran Desert define the rest of a geologically spectacular state.

Ancestral Puebloan, Hohokam, and other peoples built sophisticated societies and canal systems here; today Arizona has more tribal land than any state, including the Navajo Nation (the largest reservation in the U.S.) and the Tohono O'odham. It became the 48th state in 1912.

Deep Indigenous cultures, a strong stargazing tradition (Flagstaff is the world's first International Dark Sky City and home of Lowell Observatory, where Pluto was discovered), and Sedona's spiritual-wellness scene shape Arizona's outdoor identity.

Water scarcity and Colorado River management are existential issues for Arizona; protecting dark skies, desert ecosystems, the saguaro, and the canyon watershed from uranium mining are ongoing concerns.

Phoenix Sky Harbor (PHX) and Tucson are the main gateways; Flagstaff serves the high country and Grand Canyon. A vehicle is essential, and the Grand Canyon's South Rim corridor and popular permits use reservations.

Desert heat and dehydration are deadly serious — carry far more water than you expect to need and avoid midday summer hiking. Flash floods threaten slot canyons, and rattlesnakes, scorpions, and Gila monsters are present; the Grand Canyon's inner gorge is far hotter than the rim.

State parks charge a fee, and the Arizona Game and Fish Department administers hunting and fishing. Federal lands and the Navajo Nation may require separate passes or permits (Antelope Canyon requires a Navajo guide).

Carry water, check flash-flood forecasts before slot canyons, and respect tribal lands and closures.

Hike the low deserts in winter and spring and the high country in summer. Carry abundant water, check flash-flood forecasts before slot canyons, reserve Grand Canyon entry and permits early, and stay for Arizona's exceptional dark-sky stargazing.

Arizona borders Utah, Nevada, California, New Mexico, and Mexico, linking the Grand Canyon to Zion and Bryce, Las Vegas, the Sonoran Desert across the border, and the cliff dwellings of the Four Corners.