He said he'd been training since June last year to prepare for his first full Ironman event, and was looking forward to the hard work paying off.
"To be honest if I had to train a couple more weeks I would have been over it," he said.
It is pretty hard training for one of these events, you have to be pretty organised.
Utteridge said a lot of people, including his two sons, thought he was crazy for entering the race, which can see competitors out on the course for up to 17hours.
However, he said living a healthy lifestyle and keeping active was very infectious once you get started.
"Particularly being around the Sport Bay of Plenty office, it is pretty infectious," he said. "And the whole multisport thing - everything from mountain biking, to cycling long distance, to running - I love it."
He said he expected the toughest part of the race to be the marathon (42km run).
"The run by far will be the toughest part. I'm not a runner," he said. "The plan is to come off the bike with enough energy to get through it."
Utteridge said about 10 members from the Rotorua Association of Triathletes and Multisport were taking part .
"The RATS group are really good. I think there is 10 of us doing it," he said. "And Stephanie [McHale's] sister, Charlotte, is doing it which is going to make it pretty special ... it could be quite an emotional day."
McHale was a huge part of the club but tragically died last year.