Rainbow Bridge National Monument, Utah (1951)

Rainbow Bridge National Monument is administered by Glen Canyon National Recreation Area, southern Utah, United States. Rainbow Bridge is often described as the world's highest natural bridge. The span of Rainbow Bridge was reported in 1974 by the Bureau of Reclamation to be 275 feet (84 m), but a measurement of span according to definition by the Natural Arch and Bridge Society in 2007 resulted in a value of 234 feet (71 m). At the top it is 42 feet (13 m) thick and 33 feet (10 m) wide. The bridge, which is of cultural importance to a number of area Native American tribes, has been designated a Traditional Cultural Property by the National Park Service.

Located in the rugged, isolated canyons at the feet of Navajo Mountain, Rainbow Bridge was known for centuries by the Native Americans who have long held the bridge sacred. Ancient Pueblo People were followed much later by Paiute and Navajo groups who named the bridge Nonnezoshe or "rainbow turned to stone." Several Native American families still reside nearby.

Rainbow Bridge is one of the most accessible of the large arches of the world. It can be reached by a two-hour boat ride on Lake Powell from either of two marinas near Page, Arizona, followed by a mile-long walk from the National Park wharf in Bridge Canyon, or by hiking several days overland from a trailhead on the south side of Lake Powell (obtain a permit from the Navajo Nation in Window Rock, Arizona).