Scott Bailey, along with his wife Olivia and determined friends and family, are braving the gruelling Point to Pinnacle to support research into Parkinson's Disease.
Mr Bailey was diagnosed with Young Onset Parkinson's at 39.
Young Onset Parkinson's Disease is the same as Parkinson's Disease but suffered by those under the age of 55.
"It affects a lot of people ... people don't consider it a young person's disease, I certainly didn't," Mr Bailey said.
"When it was suggested to me ... I initially was in denial and I thought the doctors had it wrong, but I came to accept it.
"It was hard, especially when you've got young children, you've still got to be a father and run after them and maintain your physical ability as long as you can."
This will be the third year the group will be doing the Point to Pinnacle, and Mr Bailey's second.
The group has been raising funds that will go towards the Shake It Up Foundation, which is wholly committed to conducting research into Parkinson's.
In other news:
There is no cure for Parkinson's Disease.
"The best you can do is try and be as good as you can and delay the progression as long as possible," Mr Bailey said.
"That's why we do the fundraising through Shake It Up because 100 per cent of their funds goes directly into research."
Mr Bailey was and still is heavily involved in athletics, keeping him in good stead while he tackles the notoriously hard trek.
Both Mr and Mrs Bailey agreed the Point to Pinnacle was a tough run for anyone regardless of physical ability.
"It's pretty tough, it's classified as the world's toughest half-marathon," Mrs Bailey said.
"The first year I did it I couldn't walk for a week... it is challenging."
This will also be the first year Mr and Mrs Bailey's children will be making the journey by bus to the summit of Mount Wellington to greet their exhausted parents.
The group is still seeking funds for the Shake It Up Foundation. You can donate by visiting shakeitup.grassrootz.com