Dean was pleased with the pace despite the absence of a number of familiar faces, sitting on the shoulder of second-placed finisher David Sullivan until the race's final stretch.
"I did it last year, and I did almost two minutes quicker this year so I'm stoked with that.
"I let him set the speed all the way to the base track and then I put on the gas."
Dean will now turn his attention to preparing for the Ironman and triathlon seasons, with the Port of Tauranga Half in January a major target.
Women's winner Sue Crowley saw her lead slip away on the Mauao base track, but managed to attack second-placed Jessica Walley on the last couple of hills to pull away to win by six seconds.
The Rotorua athlete had been close to writing herself off when Walley flew by, but backed her ability to attack on some of Mauao's tougher sections.
"The last kilometre I thought I could do it, she said.
"It's hard, once you go for it you have to commit yourself. I knew she was right behind me."
There was some difficulty with runners and walkers sharing the Mauao base track, but Crowley said the two groups of competitors managed without too many problems.
"They were pretty good - there were only a few. The ones that are going the same direction can be a little bit tricky because they don't know you're there. If you yell 'excuse me' they get out of the way - it's their day too."
James Robertson was the first runner home in the Bay of Plenty Times Surf to Surf in a time of 16m 49s ahead of Nicholas Wotton and Lee McLean.
Michelle Radley took out the women's event in 17m 14s, with Sophie McConnell and Lourdes Devine finishing second and third.