"The main appeal of the marathon is it is just one lap of the lake," said Rotorua's Colin Smyth, who has finished all the previous marathons.
"I've competed in marathons of two laps, five laps but it is just not the same."
Top of Athletics New Zealand's list is that the Rotorua Marathon is considered New Zealand's number one.
The most historic marathon in New Zealand should be on every aspiring runner's bucket list, said Bernie Portenski, who has finished it 32 times with 11 podium finishes.
"It is always the biggest marathon in New Zealand and because it was Rotorua, it was something I had to do annually," she said.
"This is the New York or Boston Marathon of New Zealand, so why wouldn't you do it?"
Entries are available until race morning, you can enter online at www.rotoruamarathon.co.nz.