This is the Riverland Dinghy Club. As all good things in Australia were, it started back in the 1980’s after a bet between two mates to see who had the fastest dinghy. It now has a proud heritage of racing insanely powerful small boats on tiny rivers in country South Australia.
The video above is an example of one of their derbys, and it looks amazing. How much is membership?
(Skip to 1:54 for the river dash).