"Lance Downie of Murupara won the Big Kid Adventure Run in the tenth anniversary, while Sjors Corporaal won the Goat Tongariro for the fifth time.
"Sjors coaches Lance, so it will be a battle between master and pupil."
Cameron also tipped Tauranga's Dennis de Monchy - a former New Zealand Rogaining representative - as a chance at the top end of the field.
The event is a 17km inland bush run that starts at Wairere Falls on the western side of the Kaimai range and finishes at the Aongetete Lodge in the Kaimai Mamaku Forest Park.
The first two kilometres includes a 900m section of Goodwin Road, followed by an 1100m private land section over a rocky cattle race leading to the Wairere Falls entrance.
What follows is a 15km single-track course featuring a stunning narrow gorge, bridged mountain stream crossings, native forest, the North Island's highest waterfall and a tough 121-step staircase that is not for the faint hearted.
The event debuted last year as an offshoot to The Original Tongariro event thanks to cooperation between organisers, DoC, local iwi and other private landowners, and includes 800-1000m of vertical climbing.
The race features a series of wave starts staggered five minutes apart from 10.30am, with entries open until 10pm on Friday night.