If you're looking for an outdoor adventure across the Pacific Northwest, this Idaho-Oregon border town is the perfect ...

One of the famous passes through the western Montana mountains is Hell Gate canyon. This rift in the rugged hills is, for the most part, cut only wide enough for the river which courses westward ...

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 ...

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 ...