He said the beauty of Ironmaori was that people could go into the event with "no expectations that they will be a world champion — just an expectation you'll do your best".
"It is a journey for many of them, and there's that beauty of seeing whanau supporting whanau, and even strangers, to help get them across that line."
As it turns out, the process in becoming a police officer may take about as much time as preparing for Ironmaori, starting this week with police staff on-hand to answer questions about the career on Friday afternoon and again throughout the day on Saturday.
After starting as a 20-year-old in 1996 it was two years before Rowden became a policeman, following a process which tests the resilience and determination to get into and stay in the career.
On Monday, a new police recruitment video was unveiled, sparking more than 300 inquiries about joining the police. Today a new poster campaign will be revealed.