15 & 16 August 2025
INFERNO Triathlon (Single)
With 5500 altitude meters to tackle, the INFERNO Triathlon counts among the world’s most challenging long-distance triathlons and is an absolute classic. The unique experience amid the picturesque mountain landscape of the Bernese Oberland and the informal atmosphere make the Single INFERNO a truly memorable competition.
INFERNO Team Trophy/Couples
The team competition is aimed at competent recreational athletes and puts enjoyment to the fore. Each of the team members completes one of the four stages. Teams can be all female, all male, or mixed. Experience the INFERNO feeling as part of a group and cross the finish line in Muerren together with your team mates – an emotional moment!
Half marathon and relay race
With more than 2000 altitude meters, the “hellish mountain run” is a tough challenge for well-prepared and experienced mountain runners. Part of the Swiss Running Trophy, the route leads from Lauterbrunnen via Muerren to the finish on Piz Gloria at 2970 metres above sea.