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 ...

Hells Gate State Park, located in Lewiston, Idaho is—as the name implies—a gateway to the deepest river gorge in North America, Hells Canyon. It also boasts its own geologic wonder: the park lies on a ...

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 ...

Everything’s bigger in the US, they say, and that apparently includes its river gorges. But don't be fooled by its grand size – this geological giant is a fresh-faced whippersnapper by Earth’s ...

It's a warm, dry June afternoon as 13 students, a biologist and I stand on the edge of the deepest river gorge in North America, Hells Canyon, and stare in. The students are silent. Awestruck. The ...

LEWISTON – Everyone is familiar with the sorts of signs, kiosks and brochures that dispense information about treasured places. Few have given much thought to how they are assembled or the amount of ...