Durrant is Mount College's cross-country champion, though he has been kayaking for only the past year after getting inspired by coach and Coast to Coast finisher, Lyndy Wickham.
His 42m21s mountain bike leg was the fastest of the day, while he posted the third fastest run time, finishing 2m35s clear of the next fastest male, Dunstan High School pupil Sam McCulloch, with Trident's Sam Oliver third.
McKenzie won the girls race at the inaugural festival last year but she nearly completed a gender clean-sweep this time around.
The national age group triathlon champion is also a New Zealand surf lifesaving squad member and title holder, and she used all her race nous to finish in 1:37:14, just over a minute behind Durrant. She was second off the water after a brilliant 21m40s kayak leg and kept the hammer down over the final two legs to finish nearly 15mins clear of her closest female challenger, another Trident competitor, Janneke Olthuis.
"I'd only just bought a mountain bike before last year's race and this year, I decided to do a bit of K1 paddling beforehand," McKenzie explained.
As good as McKenzie's paddling was, even she had no answer for young Campbell Reid, who stormed out to a big lead in his K1 to post the fastest time, a withering 20m59sec.
He was still in front of his much older rivals after the bike leg but faded to finish fourth male in 1:39:00.