This free and fun event runs alternate Sundays that weather permits and is hosted by an outside organisation. Register with AquaPaddle to participate: https://www.aquapaddle.org
It's been likened to the water version of the Park Run.
Although its a paddle challenge you are there to improve your own time and its serious or lighthearted as you choose to make it.
Meet at the club soon after 9 to be the other side of the river* around 9:30am
You can use any craft that you are competent paddling in: kayak, paddle-board or canoe.
The timed 5km launches at 10am from outside the club BUT the safety briefing occurs on the grass other side of the river behind Garricks Temple.

* what3words address to help you find this specific location. Tap to see where:

///unity.wheels.tunes
https://w3w.co/unity.wheels.tunes