The deepest river gorge in North America, Hells Canyon was carved out by the waters of the Snake River during the last Ice Age. Hells Canyon stretches for 75 miles from the Hells Canyon Dam to the Washington-Oregon border, and is inaccessible by road. Majestic scenery and pure wilderness surround visitors during the windy journey through this canyon – either by white water rafting, jet boating and a myriad of other adventures.