Runners earn Guinness World Record for deepest marathon
· Yahoo Sports
March 11 (UPI) -- A group of runners held a certified event over 3,000 feet underground, earning them a Guinness World Record for the deepest marathon.
The marathon took place in Garpenberg, Sweden, and featured 55 runners from across 18 countries. The course measured 3,669 ft. and 10 inches underground.
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Guinness World Records noted that the depth is between the height of the world's tallest waterfall, Angel Falls, and the U.K's highest mountain known as Ben Nevis.
Runners had to wear headlamps to compete in the event, which contained 11 laps and raised around $1million for charity.
"It' hot, it's humid, it's a bit dusty, but we're good," one of the competitors told Guinness World Records.
The event was a joint venture between companies BecomingX, ICMM and Boliden. The previous Guinness World Record for deepest marathon went to the Crystal Mine Underground Marathon in Germany, which took place 1,640 ft. and 5 inches below sea level.
Runners strap headlamps on to tackle deepest marathon over 3,000 ft undergroundhttps://t.co/bfxoFBJEsa— Guinness World Records (@GWR) March 11, 2026