The three are relatively new to the running scene and will be participating in the event for the first time.
Walker and Coromandel said they would be stick together throughout the race and had even bought co-ordinated running gear to keep them motivated.
"I'm genuinely excited to get out onto the trails. It's going to be awesome," Walker said.
"If you had asked me a few years ago what I thought about running, I would have said there is so much more that you can do with your life than run. Now look at me, I'm jumping on the bandwagon."
The gun will go off at the start line just after 8am, but before heading off on their adventure Inia will welcome visitors to Te Puia, while Walker and Coromandel will have an early start, preparing and then serving coffee and food in the lead-up to the event.
"The atmosphere is amazing and I love seeing everyone right at the beginning before they even make their way to the start line," Inia said.
"There are so many awesome people out on the trails and it's how I have met some of my greatest friends. When you're out there and you find someone that's your speed, grab them and go on the adventure together, you'll never know where you'll end up."