And the day when he bows out isn't coming soon as he still thrives on beating all of the young contenders to his throne.
"I'll keep going until I don't have that passion for going out training 40 hours a week.
"That's when I'll know that it's time to hang up the shoes."
That is nothing but bad news for Terenzo Bozzone, who came close to upsetting Brown in 2010, but the North Harbour athlete wants to beat good mate Brown fair and square.
"I guess one part of me says yeah, I wish Cameron would step aside, but a bigger part of me wants him to continue competing as long as he can," said Bozzone.
"To be honest, I feel like it would almost be a hollow victory winning Ironman New Zealand without Cameron Brown being there."
The then 25-year-old attacked Brown from the outset last year and opened up an eight minute buffer after the first lap of the 180km bike.
But Bozzone, in only his second Ironman at Taupo, paid for his boldness as Brown ground down the gap to just one minute off the bike.
Brown claimed the lead within 5km on the way to another sub-2hr 50min marathon and showed Bozzone, again, the true class of his rival.
"I gave it a shot but I guess I paid for my lack of experience," said Bozzone after the event in 2010.
"I felt I was okay at that pace on the bike but on the second lap my wattage went down when the winds blew and I was in trouble.
"He's an athlete who really knows how to step it up, especially here at Ironman New Zealand. So if there is anyone that can win a race 10 times, it's Cameron Brown here in New Zealand."
It was another stunning performance from Brown to win in 8:21.52, his third-fastest time in Taupo where he now has recorded six of the fastest seven times in history.
He expected Bozzone, a regular training partner when the pair prepare for taking on the World Ironman Championship at Kona, to attack him again.
"He'll be definitely trying to take it to me again at some point," he said.
"I'll be trying to limit any losses I can if he gets a lead and then hopefully I'll be able to make up the lost ground over the run leg like I normally do".
There are a number of other top contenders to upset both Brown and Bozzone.
Kiwi Keegan Williams, who is coached by legendary coach Brett Sutton, had a podium finishes at Copenhagen and Wanaka and placed fourth in Taupo last year.
Czech athlete Petr Vabrousek (34) will compete in his 100th ironman in Taupo.
And Swiss athlete Mathias Hecht, who has been preparing in Australia, has four ironman podiums to his credit including runner-up in South Africa and Switzerland.
But Brown is the hot favourite and was pleased with his form in January where he placed third at the Port of Tauranga Half, only 45 seconds off winner Kieran Doe.
He feels like he is peaking well for this week and he still gets a buzz out of the beating his younger rivals.
"It's a nice bonus when you finish the race if you have taken the title and beaten a couple of young guys in the process.
"It's a good motivating factor for me, that's for sure."
And Bozzone expects to be better prepared from his experience in 2010.
He believes he has improved as a runner and aims to get the balance right between pacing himself and attacking Brown.
"I would like to have a bit of a buffer going into the run but I'm not scared if we get off the bike together.
"I know I can mix it with the best so bring it on."
For all triathlon fans history is set to be made in Taupo next weekend.
Brown looks likely to add another indelible mark on Ironman New Zealand - an event he has dominated for more than a decade.
