Earlier Spanish triathlete Javier Gomez took out the men's race in one hour 55m 51s.
The London Olympic silver medallist has raced and won four times in New Zealand, starting with the under-23 world championship title at Queenstown in 2003.
Gomez triumphed after initially duelling with compatriot Mario Mola on the first lap of the run.
The first prize for men and women is US$20,000.
Mola was second, 12s back with Portugal's Joao Silva 31s off Gomez in third.
The hilly terrain hardly proved a deterrent for athletes despite most being more familiar with the flat courses of Europe. There was less than 20 seconds across 27 athletes as they made the transition to the run.
Tony Dodds was the best performed New Zealander in seventh. Compatriots Clark Ellice and Ryan Sissons were 11th and 14th respectively. Dodds stuck with the lead group until the run. He was third on the first lap before slipping back after completing a 15s transitional penalty over what were understood to be some misplaced goggles after the swim.