Château-Gontier International Triathlon 2026

If you want a triathlon that mixes city, nature and a real atmosphere, the Château-Gontier International Triathlon ticks all the boxes, in the heart of Mayenne, in the Pays de la Loire ✅.

Here, you go from the energy of the town center to greener spots in just a few minutes, with waterside views and sections that make you want to pick up the pace just “for fun” ! 😄

As for formats, you choose your adventure: 10.3 km to get started, 25.75 km to challenge yourself, or 51.5 km to make a truly great memory—and if you want to share the effort, there are in relay versions (S and M), perfect for coming with your buddies 👥.

And if you’re coming with family, it’s the ideal spot: there are also kids & juniors courses, so everyone has their start line and their proud moment 🧒.

After the finish, I’ll guide you just a stone’s throw from the start: go unwind along the Mayenne (a peaceful stroll), take a tour of the Jardin du Bout du Monde for a green break, head over to the Refuge de l’Arche if you’re staying a bit longer (great for families), and finish with a terrace in Château-Gontier town center to recount your race “with your hands” over a nice snack 🏞️.