Sierre-Zinal, located in the heart of the Valais Alps, offers an extremely demanding course: 31km in distance, with a 2200-metre ascent and a 1100-metre descent. The exceptional scenery, warm atmosphere and impeccable organisation explain the success and longevity of Sierre-Zinal. As Jonathan Wyatt wrote.

What's more, it's considered to be the oldest major mountain race in Europe.

Shuttle buses are organised to take runners to the start of the race.

Registration opens on 2 April