Hells Canyon is the deepest river canyon in the United States. Now scientists have solved the mystery of when it formed.

Ahead of his most recent trip, KNXV-TV in Flagstaff ... 81-year-old with cancer completes 24-mile Grand Canyon hike in 21 hours 90-year-old who got degree after 'many' all-nighters has 'a ...

Strolling through ancient, sun-kissed towns, and feeling the tug of the tide in warm, turquoise waters. Uncovering rich ...

Dam maintenance and non-native fish reduction efforts led the government to reject an environmentally restorative flood in the Grand Canyon.

Enjoy flat walking for about a half mile past manzanita, prickly pear, and agave plants as the trail contours above the floor of Wilson Canyon. Steamboat Rock juts out from the east canyon wall, and ...

While the bulk of Grand Canyon visitors head to the ubiquitous Grand Canyon Visitor Center located at the canyon’s south rim ...

Start in Las Vegas and end up in a landscape that feels like Mars — with plenty of killer meals in between L as Vegas is ...

This one-day itinerary includes the best of Grand Canyon's South Rim, including El Tovar, Mather Point, Bright Angel Trail ...