Brett Hillier is set to run up the hill from Discovery Bay towards to Discovery Bay golf course 51 times as he accumulates the equivalent elevation of Everest, 8,848m. The feat, known as “Everesting”, will take around 24 hours and will consist of 1.74km laps. Hillier can have help coming downhill, so will ride bikes or catch lifts with supporters in golf buggies.

But the challenge itself is not the only motivation. Hillier, 31, originally from Australia, is raising money for the State Emergency Fund of South Australia in the wake of the devastating bush fires. Hillier’s Australian-based friend David Turnbull will Everest a hill in Australia, then hand the virtual baton over to Hillier to start his run in Hong Kong on Saturday afternoon.

“Doing something greater than yourself, it becomes more important. The idea of quitting is further away when the challenge is bigger than yourself. I could go and do this Everesting any time, and it would be a great physical achievement, but it wouldn't have the same impact,” Hillier said.

Hillier, a tennis coach in Discovery Bay, said it was sad to watch places he has visited burn.

“It was crazy. And I felt helpless, and to know the government could have done things to prevent it, it was sad, but it was very frustrating. What could we do? But when David mentioned this I thought we’ll get to do our bit,” he said.

Hillier ran from Perth to Melbourne in 2015, which is where he met Turnbull. The latter gave up his time to drive Hillier’s girlfriend to the airport having seen a Facebook post about the challenge.

Hillier has been spending a lot of time in the mountains training for the Everesting but not spent much time on the route. He thinks physically one of the hardest things will be the strain on his ankles. The constant flex will pull on his Achilles and inevitably cause pain.

But mentally, the monotony is likely to take a toll too.

“I try not to think,” he said. “I don't think about the end. I focus on a spot I can see, a lamp post, a tree or a peak, then the next one. I turn off my brain. I don't listen to music, I can just go into a another world.

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“But I found that at six hours, things really begin to hurt. Then six to eight hours is a real battle. Then from eight onwards your body just accepts what you're doing. But I haven't run longer than 12 hours, so that will be a test, an unknown,” Hillier added.

He hopes to raise A$8,848 (HK$44,296), to match the metres run. To break up to the boredom and to encourage donations, he will be having an auction while he runs, betting those following online money that he can complete certain laps in a certain time. But once it is over, this the last unofficial challenge he will do for a while.

“I’m now trying to set proper goals, rather than just events like this, but marathons, multi-day races, long distances and set some good times,” he said. “I have nine or 10 years before I slow down. I was an elite tennis player, maybe I can tip it over into the running world. The running world is really nice, you can spend a few hours in the mountains with someone and then go and have a beer. It's a really down to earth community.”

You can donate to Hillier’s charity page here.