Information on the INFERNO 2026 route changes

The road cycling route is not cordoned off. All participants must strictly observe the traffic regulations and follow the instructions of the traffic control team. Drafting is prohibited. There will be a few roadworks along the route, which require all road users to exercise caution.

In Interlaken, the route will be diverted due to roadworks. You can see the route adjustment illustrated here.
PLEASE NOTE: This last-minute adjustment has NOT been reflected in the GPX data in the download section.

For safety reasons, the route between the entrance to the village of Grindelwald and the transition area in Grindelwald will be neutralised. No timekeeping will take place on this section. All participants must therefore adjust their pace accordingly!

INFERNO Sunday runs on 16 August 2026

Registration via Datasport for the Junior Trail Series is now open. Sign up today and be part of this highlight. You can find all the information and the registration link here.

In addition, the GPS data for the Junior Trail Series is now available in the download section.

Late registrations for all Sunday runs (children’s, family, trail and JTS runs) can be made free of charge directly at the Mürren Sports Centre up to 20 minutes before the start of each race.

Athlete exchange via social media

We’re running the Athlete exchange via social media again this year. Would you like to make yourself available for a particular discipline, or is your team still looking for new members? No problem. Please email fabienne.hasselmann@inferno.ch with your details. We’ll then post a call for participants via our channels.