Information for athletes

Get all the information about Inferno 2026 now!

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14. - 16. August 2026

Inferno Triathlon

Welcome to one of the most beautiful and spectacular endurance competitions in the Swiss mountains. INFERNO - The ultimate experience!

Races

Choose your discipline and challenge yourself!

Discover all disciplines and get more information. Whether you are a single athlete, a half marathon, couple or team trophy participant or a family or trail runner - INFERNO is for all exercise and sports enthusiasts.

Inferno Showcase

Triathlon

Experience 5,500 meters of altitude in a breathtaking setting. One of the toughest triathlons in the world.

Inferno Showcase

Team Trophy & Couples

Whether as a team or as a couple - take on the challenge of the Inferno Triathlon! Share the disciplines, master breathtaking routes and experience unforgettable moments in the Swiss Alps.

Inferno Showcase

Half marathon & relay

Experience the “devilish mountain run” at the Inferno Half Marathon & Relay Race - with over 2,000 meters of altitude, this mountain run is a must for anyone looking for a real challenge.

Inferno Showcase

Trail- & Family-Run

The program on Sunday for young and old. For children, families and beginners! The running routes offer views of a breathtaking panorama as well as exciting (running) trails in and around Mürren.

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News about INFERNO 2026

This page is updated regularly. Find out the key information about the INFERNO Triathlon, the INFERNO Half Marathon and the Sunday runs. Version: 24 July 2026

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Your partner for triathlon camps & cycling trips: Eitzinger Sports

Get ready for the triathlon season!

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Race cancellation Schilthorn mountain run Triathlon Singles

Due to a severe thunderstorm cell over the Schilthorn, the race from Mürren uphill must be cancelled immediately for safety reasons.

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INFERNO Triathlon 2025

Everything ready for an unforgettable event!

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Everyone is welcome

Instead of the Fun Triathlon on Friday, this year's Inferno Triathlon will feature trail and family runs on Sunday. Find out more about the new format.