Alex Williams of Christchurch played the perfect waiting game in the women's marathon, getting stronger over the second half to win the New Zealand title in a course record 2h 41m 28s.
Williams, 31, clipped 28s off Lisa Robertson's record set last year and carved nearly four minutes off her previous best time.
Williams said that the conditions were ideal as she set out conservatively from the start.
"I was stoked it wasn't raining as had been forecast earlier. I was third until the bridge crossing and then I caught the Australian Anita Keem, who was Oceania champion at Gold Coast this year," Williams said.
"I stuck with her for a while and I could see in my sights the lead motorbike so I knew that Sally Gibbs was within my grasp," Williams said.