This rapid derives its name from a red ball that is suspended on a wire over the end of the rapid.
Immediately after Entrance Rapid the river turns left into this 150-yard stretch of whitewater with about two dozen great surfing waves and holes.
These waves are great surfing at 10.5 feet. At 11.5 feet this becomes a heavy class III run, with large waves and a stopper hole. At 13 feet this stopper hole is monstrous.