Established 2/26/1919 Size 1,217,403.32 acres (4,926.7 km2) The Grand Canyon, carved out by the Colorado River, is 277 miles (446 km) long, up to 1 mile (1.6 km) deep, and up to 15 miles (24 km) wide. Millions of years of exposure has formed colorful layers of the Colorado Plateau in mesas and canyon walls.[29]
Grand Canyon National Park, located in northwestern Arizona, is the 15th site in the United States to have been named as a national park. The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Wonders of the World. The park, which covers 1,217,262 acres (1,901.972 sq mi; 4,926.08 km2) of unincorporated area in Coconino and Mohavecounties, received more than 4.7 million recreational visitors in 2022, which is the second highest count of all American national parks after Great Smoky Mountains National Park.[5] The Grand Canyon was designated a World Heritage Site by UNESCOnayasu in 1979. The park celebrated its 100th anniversary on February 26, 2019.T