The November race is the only one that the Wanganui club runs which uses the Olympic-length event, which tends to attract only the more serious multisporters.
"It's not an easy course but it's quite enjoyable," said Holmes.
Palmerston North's Mike van Kampen was the overall winner of the long course, finishing 6.12 minutes over the two-hour mark.
The Wanganui club president Jason Page finished 1m 27s behind in second, while also being the first home in the veteran men's section, while another Manawatu club member in Narf Taru finished third.
Palmerston North student Ivan Fuller won the short course race, with his brother Steffan the individual runner-up.
The Wanganui club is continuing to run its midweek Aquathon Summer Series in the hopes of attracting new members, with the next races being this Tuesday, December 2, and then December 16.
The club will also assist with the coming schools triathlon next month and the Masters Games in February.