RunSwimRoadbikeMountainbikeHalf marathonRunSwimRoadbikeHalf marathonRun

INFERNO - 20 & 21 August 2021

Welcome to one of the most beautiful and spectacular endurance events in the Swiss mountains.

Inferno – the ultimate experience!



Events, starting & ranking lists

Online registration!

Starting on 11 November 2020 11:11h



The OC, FAQ, weather and more

News & Media

News & Media

News, downloads, galleries & more

Sponsoren & Partner

Sponsors & partners

Many thanks to all supporters!


INFERNO Rennbüro
3825 Mürren
Tel. +41 33 856 86 80


Acutal topics around the INFERNO Triathlon

Registration 2021 open!

Registration 2021 open!

The registration for all INFERNO events 2021 is now online!

All participants who have transferred their starting place to the year 2021 do not need to register anymore - you will automatically appear on the starting list.

Registration start 2021!

Registration start 2021!

We look forward, step on the gas and make an announcement: The registration for the INFERNO Triathlon 2021 will open this year on 11.11.2020 11:11h.