The event is organised by the Lihir Triathlon Club and includes distances of 69km on Day one, 96km on Day two and 98km Day three.
The Buluminski Highway is sealed all the way except for a section of 28km after the first 41km.
Day one event on Thursday, April 13 is a mixture of dirt and sealed road.
Day two scheduled on Friday, April 14 will see participants cycle on a 96km sealed road.
The final day on Saturday, April 15 participants will also cycle on a 98km sealed road.