Several popular trails in the Grand Canyon National Park have reopened after workers stabilized a dangerous chlorine gas leak near the Roaring Springs waterfall. The reopening came after concerned ...

A smallmouth bass chokes down a sucker on the Yampa River, a tributary of the Colorado. Photo by NPS A few Western lawmakers in the Senate and House of Representatives are leaning on the Trump ...

The Grand Canyon is the biggest canyon on earth: 277 miles long, 10 miles wide, and a mile deep. It contains some of the oldest exposed rock on earth, Precambrian Vishnu schist, formed 1.7 billion ...

The Canyon is a Book of Revelations in the rock-leaved Bible of geology. - John Wesley Powell A professor of geology at Illinois Wesleyan, John Wesley Powell had more than just a passing ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon of the Yellowstone is the primary attraction in the Canyon Village area ...

The public lands surrounding Grand Canyon National Park contain high concentrations of uranium ore. Mining bores deep into vertical rock formations called “breccia pipes,” making uranium soluble to ...

Phantom Ranch has reopened after repairs to its water and electricity lines. Here's the cost to stay at Phantom Ranch and how difficult the hike is.