Serre Poncon Swim Challenge

Two distances. One extraordinary lake.
Dive into the Serre-Ponçon Swim Challenge - an open-water event designed for passionate long distance swimmers seeking something truly unique.

The Serre-Ponçon Swim Challenge is a long-distance open-water swimming event held on one of Europe’s most beautiful mountain lakes — Lac de Serre-Ponçon, in the Hautes-Alpes region of France.

This ﬁrst edition, taking place on Friday 3 and Saturday 4 July 2026, brings together passionate swimmers, kayak partners, safety teams, and the local community for a weekend of endurance, connection, and respect for nature.

Two distances — 12 km and 20 km — invite experienced swimmers to take on a personal challenge in a fully supported and professionally supervised environment.