One Day 2026

In Cholonge, in the heart of Isère, One Day lives up to its name: you come for a nature adventure, you leave with memories filling your shoes🌲.

You’re in the heart of Auvergne-Rhône-Alpes, between wild spots and panoramas that make you look up even when you thought you’d only be watching your feet ⛰️.

The concept is simple and incredibly motivating: you choose your format and have fun with time. 24h if you want to live a real epic, 6h if you want to treat yourself without sacrificing your weekend, or the two-person relay and four-person relay versions if you’d rather share the effort and the laughs 🤝.

And after the race, stay in the area. Just a few minutes away, you can go unwind at Lac de Laffrey for a stroll by the water, head to Vizille and its Château Estate to decompress in the greenery, or push on to La Mure to take a big breath of fresh air on the Matheysin Plateau.