Against the Montr'ail 2026

If you’re after a nature outing that doesn’t take itself too seriously, Against the Montr'ail in Cernay-la-Ville is exactly your vibe 🥾.

Here, the idea is to come as a team, let loose over a 4 km format, and above all play along: costumes, a quirky vibe and good spirits, all without a stopwatch so you can enjoy the terrain and your buddies 😄.

As your local guide: around Cernay, you’re in for a treat with forest trails, fun little bursts, and a big breath of Yvelines fresh air—just a stone’s throw from Île-de-France that can still feel wild 🌿.

And the name says it all: here, you come to go against… the clock, and to show off your best costume, even if it stings the eyes a bit in the photos 📸.

After the event, don’t rush off: take a spin by the Abbey of Vaux de Cernay, go get some air around Rambouillet (forest and a lovely town), or head out to Saint-Rémy-lès-Chevreuse for a stroll and a drink on a terrace with the team 🍹.