Hells Canyon is a ten-mile wide canyon located along the border of eastern Oregon and western Idaho in the United States. It is North America's deepest river gorge at 7,993 feet (2436 m) and the most important feature of Hells Canyon National Recreation Area. The canyon was carved by the waters of the Snake River, which plunges more than a mile below the canyon's west rim on the Oregon side and 8,000 feet below the peaks of Idaho's Seven Devils Mountains range to the east.