Bridlington’s Steve Tighe finished 11th at the World’s Toughest Mudder race in Las Vegas.
The Blast Fitness owner was the top British athlete at the endurance challenge, completing 15 gruelling laps in 24 hours, 41 minutes and 30 seconds.
He covered 75 miles in the desert, battling through around 20 obstacles including a lake swim, barbed wire and electric shocks, and was second in the 35-to-39-years age group.
On his Facebook page, Tighe said sandstorms in the desert had made conditions more testing than he had envisaged.
He said: “All distances aside, that event was the hardest thing anyone could possibly imagine.
“It was like something out of a twister movie - kicked in late evening and was relentless all through the early hours.
“I salute every competitor out there that didn’t end up in A&E.”
Tighe started off with a 45-minute lap of the five-mile course, and by the midway point of the race, he was outside the top 100 and lapping in around one hour and 45 minutes.
But amazingly, having already covered 40 miles, he found a second wind and speeded up, completing a 1:19 lap in the later stages of the race.
Tighe finished in 50th position in 2013 and had said his dream would be to finish in the top 10 this time, but he finished an agonising two-and-a-half minutes behind the 10th-placed runner.
His girlfriend Steph Clappison also took part in the race, and completed six laps, 30 miles, finishing 617th overall, and 63rd woman.
On her Facebook page, she said: “The course was brutal. The windchill factor was -5, which eventually broke me at 30 miles.
“Somewhere in lap five my leg started screaming no, being unable to keep pace, my core temp just went down.
“I didn’t enter The World’s Toughest Mudder to place, this was purely a personal challenge, I wanted to prove to myself how far I’ve come in the last year and a half.
“Thirty miles may not be the earth, but for me it’s by far the furthest distance I have ever run, making those 24 hours a milestone in my life that I am very proud of.”
The couple were taking on the challenge to raise money for Help For Heroes and the Alzheimer’s Society. They had raised £5,000 before they even set off on the plane to Vegas, and are hoping to reach £8,000.
Donations can still be made at their Virgin Giving web page.
The race was won by Canada’s Ryan Atkins. The 26-year-old, who also won the 2013 event, covered 95 miles in 24 hours. Amelia Boone was the women’s winner, and finished 14th overall, having run 75 miles, the same as Tighe, but in a slightly slower time.