ONE Port Macquarie cyclist has already achieved it and now two Hastings teenagers want to replicate the dose.
Monty Moore and Alani Cockshutt will attempt to ride the equivalent of Mount Everest on Sunday as they raise funds for the Starlight Foundation.
Former Port Macquarie Cycle Club graduate Lachy Morton achieved the feat a few weeks ago and now the two teenagers want to join him.
Moore admitted he had always watched the Tour de France with his father and when he bought his first bike only two years ago, an "Everesting" was the next item on the agenda.
"I've been training properly for about eight months, six days a week and I've always wanted to do an Everest; it's always been in the back of my mind," Moore said.
The duo have set themselves a goal of 12 hours to climb the required 200-kilometre course complete with 8848 metres of elevation, but will take as long as required.
"We're pretty motivated; we'll get it done even if it takes us 15 hours ... we'll keep tapping away," Moore said.
The Port Macquarie teenager was diagnosed with Congenital adrenal hyperplasia (CAH) at the age of just three.
The condition affects the adrenal glands and requires constant medication.
"It doesn't greatly affect my life, but it can be potentially life-threatening so I've got to stay on top of my medication," he said.
This year marks 11 years since Cockshutt has been cancer-free and when the opportunity came up to help raise funds for Starlight, Moore was happy to jump on board.
"I've been around really sick kids and been in hospital as a kid and seen the work Starlight does," he said.
"I appreciate how they can help and Alani's a great friend and they helped her so to support them is amazing.
"I'm happy to support a good cause."
Cockshutt said now was the time for her to give back to the foundation.
"Starlight was there from the word go and helped my family and myself get through all the tough times when we didn't really know what cancer was," she said.
"Now it's my time to give back because they continue to help kids just like me."
Should Cockshutt and Moore achieve the feat on Zwift, they will become the youngest-ever to do so.