Grand Canyon National Park rangers have already conducted 13 helicopter evacuations and summer hasn't even officially started ...

A crucial trail closure caused by construction is creating headaches for rescue officials at the Arizona national park ...

The Cambrian-age Tonto Group is a set of rocks famous for holding clues to the burst of new life that reshaped Earth 500 ...

Strong storms brought heavy rain and flash flooding, stranding hikers in the Grand Canyon, the National Weather Service ...

Heat rescues occur every spring and summer at national parks throughout the Southwest, but late May was particularly busy for ...

An 1869 expedition led by John Wesley Powell sailed out of the Grand Canyon on the Colorado River in the first official ...

Beloved Washington doctor, Dr. Dennis Smith, died during a Grand Canyon hike. Known for his fitness and orthopedic work, his ...

Critics argue that failing to flood the Grand Canyon on a regular basis causes its beaches to wash away and has a devastating impact on its wildlife. The Bureau of Reclamation has said it will not ...

Hells Canyon might be deeper than the Grand Canyon, but it's barely 2 million years old, according to a new study.

Palo Duro Canyon placed in the 10 best state parks in the United States in the USA TODAY 10BEST Readers' Choice Awards. See ...