The tournament was held at the Wanaka Golf Club and attracted a record field of 112 entrants from 45 clubs over seven divisions.
Boniface said yesterday she was thrilled with her result and impressed by the number of entrants, and the hosting club.
She felt she played some of her best golf in yesterday's final of 36 holes, during which she achieved four birdies (on holes 3, 7, 9 and 10) and finished square on the card.
"The wind got up a bit and it was a bit cold out there today. But the wind went round to the south and that was more user-friendly," she said.
Boniface defeated Wanaka semifinalist Kathy Smallbone earlier yesterday morning and was chased hard by Braithwaite in the afternoon's final.
"She didn't get away to a start like she would usually, but then she got settled into it. I got into it early and that helped my cause... It was the best round of golf I've had all week," Boniface said.
The competition began with qualifying rounds on Monday.
The field was stacked with current and past district representative players from throughout New Zealand and Australia, including Robyn Pellow of Ngaruawahia, who lost her semifinal with Braithwaite yesterday morning.
Other top players included Liz Hodgson of Taumaranui and Barbara O'Connell of Timaru, Dale Dagg of Arrowtown, Suzanne Ewing and Judy Muir of Wanaka, and Carol Bogue of Alexandra.
Kim Maitland, a former Wanaka golfer now living in Taupo, achieved a hole in one on hole 13 (a par 3) using a rescue club. Maitland had also achieved a hole in one on the Wanaka course several years ago.
Tournament director Denise Langdon praised the players and the course.
"It has been fantastic, very good. And you can't go past the beauty of the place. The front nine holes are the most scenic in New Zealand. The preparation of the course was fantastic," she said.