IronMaori event director Heather Skipworth said the event, which is aimed at promoting exercise and healthy living to Maori, had again attracted strong numbers.
"We had just over 2000 people participate this year with just over 800 individual competitors compared with 600, which we usually get."
Mrs Skipworth said the IronMaori Half Ironman was a success.
"As organisers, we believe it was our best year in terms of organisation and participation."