Huang lives in Guangzhou and was unfamiliar with the trail. He also decided not to use a GPS watch as he thought the marker ribbons and signs would be sufficient.

The decision proved disastrous for Huang, who was well ahead of everyone else when he took the wrong turn near checkpoint five.

“I was completely and utterly lost and ended up running up two extra mountains,” said the 43-year-old. “In total, I ran well over 100km.”

He said it was “extremely frustrating” getting lost and that this affected his running speed and overall performance.

“I could not relax and get into my running rhythm. I had to spend so much energy using my brain to figure out where to go and how to get back on the trail. Why would I continue running full

speed when I could be running in the wrong direction?”

His frustrations did not end there. Huang was livid, claiming race organisers assured him that he would not be disqualified if he finished the race.

“Two times they told me they would use my tracking device to calculate any wrong turns and add whatever penalties they needed to my final time, so I thought I might as well finish the race. I was so much faster than everyone else so I thought I had a chance,” he said.

“It’s completely unfair and unprofessional. Of course, if I had known that I was disqualified, I wouldn’t have finished the race. I would have been at home asleep.

“I am only in Hong Kong for a few days and I am staying at an extremely expensive, nice resort. I’m 43 years old, I would have happily gone back and rested and relaxed if I had known I had been DQ’d. Instead, they just ended up wasting my money and time.”

Huang flew to Hong Kong with the intention of earning the five International Trail Running Association points awarded to the champion. Instead, he didn’t even get a finishing trophy.

Asked if he thought he would have won the race if it were not for the sign confusion, he said: “Easily, without a doubt.”

The sign-tampering did not seem to be nearly as detrimental to locals more familiar with the trail. Benjamin Gebert, who finished third overall in 15:24.30 thanks to Huang and two other racers’ disqualifications, did not even notice anything wrong.

“I hadn’t even heard of signs being tampered with until now,” said a surprised Gebert. “I thought everyone has the option of using a GPS watch, so there’s no excuse for getting lost.

“As for me, I was quite familiar with the trail and I didn’t experience any problems. Everything went very smoothly.”

An investigation concluded it was civilians and not runners or race officials that tampered with the trail’s signs and navigation ribbons.

Whether this was done maliciously or out of ignorance is debatable, but the runners and race organisers certainly felt it was malice.

“I think it was done by bad people who didn’t want the race to go smoothly,” said Sam Tam, who won the team category along with his partner Angus Chan.

“The wrong turn definitely threw me off, but I used GPS to find my way back to the trail quickly. I saw it affected some guys really badly, though. I saw some runners looking completely lost.

Volunteer Anky Chau said: “It could have been hikers who thought it was funny and played a prank, or it could have been local village people who were upset that the race was happening near their homes. There is no way to be sure.”

All drama aside, all of the runners, even the disgruntled Huang, said the trail was stunning and a lot of fun to run.