Spanning 277 miles and attaining a depth of over 6,000 feet, Arizona's Grand Canyon ... section of river to be rafted. Shorter trips may be limited to just the upper or lower canyon, while longer ...

cooling the waters in the Grand Canyon and making them less habitable for the invasive fish. Smallmouth bass have plagued the upper Colorado River Basin for decades, impacting numerous native fish ...

Grand Canyon National Park — A solo backpacker has been found dead near a rugged and remote trail along the Colorado River in Grand Canyon National Park, authorities in Arizona said Thursday.

GRAND CANYON NATIONAL PARK — A shot of cold water from Glen Canyon Dam appears to have stalled a smallmouth bass invasion of the Grand Canyon and protected rare Colorado River fish there ...

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 ...

At least 16 people have died at the Grand Canyon in Arizona this year, including the recently recovered body of a 71-year-old man at the storied national park this week. The causes of death range ...

Hells Canyon, the deepest river gorge in the United States ... That makes it far deeper than the famous Grand Canyon of Arizona, which reaches a depth of about 6,000 feet and which has been ...