It's a race Kane Radford has spent two years preparing for - one swim that could make or break his Olympic dream.
On Friday, the Rotorua 21-year-old will travel to Portugal to compete in next weekend's 10km open water swim Olympic qualifier on the River Sado. He must finish in the top nine of the 54-strong men's field to qualify for the London Games, a chance he's been waiting for since missing selection for Beijing as a 17-year-old.
For the former John Paul College student, competing in London means everything.
"It's a childhood dream of mine to represent my country at the Olympics," he said. "There's no higher honour."
Despite such high expectations he reckons he's not nervous, not yet anyway.