The origin story of Hells Canyon, North America's deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event ...

Hells Canyon, the deepest river gorge in the United States, likely got rapidly carved 2.1 million years ago when a shifting landscape in Idaho caused a giant lake to start overflowing. That's ...

That’s according to a new study that looked at ancient river sediments that have long been hidden away inside the canyon’s caves, which now lie high above today’s Snake River. This new work is ...

While Zion National Park gets a lot of attention for a pretty good reason—the sandstone cliffs alone are worth a visit, but the slot canyons are the real claim to fame—there's another nearby park that ...

Idaho features some of the most iconic multi-day rafting trips in the United States, but the chances of pulling a permit in the Four Rivers Lottery are not very high.

Hells Canyon, the deepest river gorge in the United States, was carved just about 2.1 million years ago — making it much younger than the Grand Canyon. (Matthew Morriss) Hells Canyon, the deepest ...