Canyon, North America's deepest river gorge, encompasses a vast and remote
region with dramatic changes in elevation, terrain, climate and
vegetation. Carved by the great Snake River, Hells Canyon plunges more
than a mile below Oregon's west rim, and 8,000 feet below snowcapped He
Devil Peak in Idaho's Seven Devils Mountains. There are no roads across
Hells Canyon's 10-mile wide expanse, and only three roads that lead to the
Snake River between Hells Canyon Dam and the Oregon-Washington boundary.