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

Incredible footage of a sunset over the Grand Canyon in Arizona bathes the canyon in yellow and orange against the darkening blue sky.

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

Search and rescue teams recently conducted 13 helicopter rescues over a seven-day span. A SAR leader blames the uptick on a detour to a vital hiking route.

Los Angeles is unique in its proximity to many peaceful backpacking campsites that are under an hour's drive away. We picked ...

The arrival of summer in Arizona means the more remote side of the Grand Canyon is about to reopen ... Some segments are sketchy, so bring a map and compass.

In 1938, Clover and Jotter conducted a harrowing 43-day trip down the Colorado River in an effort to map the Grand Canyon’s flora. They succeeded, despite rampant sexism and numerous physical ...

On April 24, 2018, I emerged from a daring 12-day expedition in the wilderness of the Grand Canyon with a concussion ... despite the worsening physical weakness and excruciating pain I endure ...

Each has surprised me with unique geographic features and diverse plant life — but the North Rim of the Grand Canyon amazed me the most. With a higher elevation than the South Rim, it has cooler ...

The search and rescue team wants Grand Canyon hikers to take safety measures ... hikers in distress -- often due to heat exhaustion or physical fatigue. Their commitment ensures the safety ...