"I've been lucky with the support I've got," he said. "I'll have someone running, biking and kayaking with me."
His only drawback at the moment is a niggling leg injury which has seen his running curtailed in recent weeks.
The seed was sown back in November, when Townley's coach, Jamie Campbell, raced the Lake Taupo Cycle Challenge Extreme Enduro event. That race was eight laps of the 160km course and Townley ended up supporting him for six of those.
When he went public with this challenge he said it was Campbell's feat that inspired him.
"Doing Motu twice has been at the back of my mind for a couple of years. It was in the middle of driving around Lake Taupo six times that I decided to do it. I was inspired by Jamie."
As well as the personal challenge he wants to win a Rotorua Association of Triathletes and Multisport award, which Campbell has won the past three years for crazy efforts.
He is hoping to win the award twice and once Motu is out of the way he will start training for the next challenge, though all he is revealing so far is that it will involve a lot of swimming.
Townley has a back-up plan should the water level on the Waioeka River force organisers to have a rethink. Should they can the kayak leg he will start at 8am tomorrow and complete three laps of the race minus the kayaking.
MOTU CHALLENGE X 1
65km mountainbike
17km run
52km road cycle
27km kayak
8km road cycle
3km run