5. South Africa: Up-Downstream

The two-day, 82km “Hansa Fish River Marathon” paddle race on a river in rural South Africa boasts nearly two thousand kayakers rowing down man-made weirs and waterfalls, on class 3+ rapids. Simon and Turbo find themselves in way over their head, and fearing for their safety, have to decide between pulling from the race or finding a way to persevere and reach the finish line intact.