The race includes a 1km swim, 26km mountain bike and 11km trail run.
"They've added the Split Enz [mountain bike trail] to the bike course which I think is a trail that a good mountain biker can make up a lot of time on, if you're willing to invest and work the bike.
"Obviously I ride those trails often, but in saying that guys like Ben Allen, from Aussie, have come over here a lot earlier than you'd typically come in for a race. He's obviously made the investment to come here and learn the course."
The long course race starts at 11.30am at Tikitapu (Blue Lake).
The Xterra Rotorua Festival is in its 15th year and offers nine events for competitors of all ages and abilities to choose from, set in and around Tikitapu and Whakarewarewa Forest.
The events include a 5.5km, 11km, 21km, and 26km walk or run, the Xterra individual short course and long course, Xterra team short course and long course and, for the first time, a duathlon which includes a 26km mountain bike and 11km run.
For more information on the events and start times go to xterra.co.nz.