14 - 16 August 2026

Inferno Triathlon and Half Marathon 2026

At the start of the Inferno Triathlon in Thun, you can see the trio of mountains: the Eiger, the Mönch, and the Jungfrau.

Inferno - The ultimate experience!

The most spectacular triathlon in the Swiss mountains with the most beautiful scenery in the Bernese Oberland. From the start in Thun, you swim to Oberhofen. Here you pedal to Beatenberg, Interlaken, Meiringen, Grosse Scheidegg and Grindelwald on a racing bike. From there, take the mountain bike over Kleine Scheidegg, down to  Lauterbrunnen and on to Stechelberg. Now it's time to switch to running shoes, run via Lauterbrunnen to Mürren and  from there up to the Schilthorn.

Event information

14 - 16 August 2026

Inferno Rennbüro
P.O. Box 65
CH - 3825 Mürren
info@inferno.swiss
+41 33 856 86 86