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

A Washington man considered to be an experienced hiker has died near the end of a 24-mile, rim-to-rim hike at Grand Canyon National Park in Arizona, officials confirmed. Dennis Smith, 74 ...

A 92-year-old man is now the oldest person on record to have conquered the Grand Canyon's 24-mile, rim-to-rim hike. Guinness World Records confirmed the feat on Tuesday, about two months after ...

They range in size from a few dozen acres to nearly 2 million acres. The Grand Canyon Trust focuses our national monuments work in three monuments where we helped gain protections: Grand ...

A 74-year-old man died while hiking the Grand Canyon, the National Park Service said Monday. The man, identified as Dennis Smith of Olympia, Washington, was attempting to hike from the canyon's ...

ARIZONA — National park rangers in Arizona said that a 74-year-old from western Washington has died on a trail at the Grand Canyon. Rangers said Dennis Smith of Olympia was an avid and ...

The National Park Service is urging hikers to prepare both physically and mentally before heading into the Grand Canyon — following the death of a 74-year-old man last week on a rim-to-rim trek.

The Trump administration’s Education Department has rescinded a $37.7 million fine against Grand Canyon University in Phoenix. The Biden administration had levied the fine against the university in ...

A 74-year-old avid hiker from Washington died last week during a rim-to-rim trek in the Grand Canyon, park officials said. Dennis Smith, of Olympia, became unresponsive at about 4:45 p.m. Thursday ...

In the 19th century, many people believed that landscapes like the Grand Canyon were shaped by volcanoes and earthquakes. But one American geologist named John Newberry had different ideas.