A former New Zealand representative rower like her brother Ben Hammond, the 29-year-old Candice Hammond said she had remained focused despite being three minutes behind coming out of the water.
"I'm trying to work quite hard on my swimming but it is taking me a long time to get it right.
"I try to keep it positive in my mind and just focus on the bike and the run," she said. "It is the fourth time I've raced here and I really wanted to win one so I'm really stoked, it means a lot to me."
The part-time sheep farm worker in Cambridge has a full schedule of racing ahead as she will enter the Tauranga Half Ironman, Challenge Wanaka, Wells New Plymouth, Ironman NZ and then Cairns.
Lawrence, who was also runnerup in 2010, had made a good comeback after being fifth in the Taupo event in 2012.
"It was a little rough on the first lap of the run but I kept it under control and I tried to bring it home a lot stronger on the last lap and thankfully the legs came around."
Having led through two sections before being run down, Watkinson congratulated both Hammond and Lawrence.
"I had a good swim, I managed to get my own space at the start right through to the end.
"I possibly biked a little bit hard and I cramped in the bum muscles by the time I got to the run."
The men's section was won by Hamilton's Graham O'Grady in 4:00.28, defending his title from 2012.
Barb Hammond said her daughter was not the only Wanganui person to enjoy success. "Allan Luff, a master cyclist and team event participant, missed in trying to chase Candice down but came away with a spot prize instead."