The event was organised to both promote the school and boost water safety.
About 40 people using a variety of craft paddled their way through a course that criss-crossed the river.
Among those out enjoying the water in a waka were (from left) Ollie and Tray Rangi (both 9) and Cyrus Burrow (8), of Waikouaiti, and Brendan Flack, of Karitane.
For those who worked up an appetite, there was a sausage sizzle afterwards.