There are white water rafting trips. And then there's a Hells Canyon Rafting Trip. Offered by Row Adventures, these trips range in length from 3-6 days, begin in Cambridge, Idaho, and end in Whitebird or Lewiston, Idaho, depending on the length of the trip. On the way, you'll tackle rapids all the way up to Class IV — or Very difficult, and the worst any normal person needs to deal with — while enjoying the views of the deepest river gorge in North America.