The Snake River winds northward along the border of Idaho & Oregon , within the magnificent corridor called Hells Canyon—the deepest gorge in North America . From the moment you step on the raft the first day of your trip, you are guaranteed to sit and stare in awe at 8000 feet of rocky cliffs and grassy slopes cascading to the deep green waters of the Snake River . Each day and every bend in the river presents new treasures and exciting rapids. The Snake River 's powerful display of whitewater features Wild Sheep & Granite rapids (both Class IV), and numerous Class II and III rapids sporting big crashing waves and surprising twists and drops.