Karen Masson leads the Australian female entries and also has good form which includes winning the Adventurethon National Challenge Ultra distance event in Townsville.
Kohlar lost his last battle with Clark at the Augusta Adventure Fest in Western Australia, losing time in the bike leg, but hopes to mount a good challenge this month.
Adventurethon Series event director Joel Savage said he was excited by the potential of the New Zealand verses Australia showdown on race day.
"I think the bike strength goes Clark's way so the question is will it be possible for Kohlar to out run and paddle him, or will Clark use the cycle legs to damage Kohlar. Either way it's set to be a real transtasman battle that should add some real spice to the racing."
Savage said that having seen both Clark and Kohlar in action recently, he rated them as very close and both capable to beat each other.
For the women's race Masson is a performer who won the Adventurethon National Challenge 2015 and has been preparing meticulously for the Coast to Coast since July last year.
Masson has a strong bike and run leg with paddling being her newest discipline.
Masson will have to overcome top Kiwi athletes like two-time winner Elina Ussher and Corrine Smit to make the top step of the podium.
Five-time Coast to Coast winner, turned race director, Richard Ussher said he was looking forward to seeing Australians take on Kiwis.
"We are keen on growing our international competitors and there is no doubt Jared and Karen led some talented Australians at this year's Coast to Coast that will add some real spice to the racing."