This event is in the past.It took place on May 9, 2026 at Base Nautique de Mazerolles.
Aquatic
AquaticTest your limits in a 44km river marathon where the only way out is the finish line. Spectators cheer from the banks as swimmers tackle distances from 3km to THE RACE 44, all while raising awareness for cleaner waterways.
endurance swimming
open water challenge
eco-conscious event
spectator-friendly
Tips
🌡️water's a brisk 16°C — wetsuit recommended
👥relay teams welcome for the 20km Course du Rohan
🛶each 44km swimmer gets a personal kayak escort
Free
Nantes Open Wat'Erdre
Sucé-sur-Erdre
AquaticAquaticTest your limits in a 44km river marathon where the only way out is the finish line. Spectators cheer from the banks as swimmers tackle distances from 3km to THE RACE 44, all while raising awareness for cleaner waterways.
endurance swimming
open water challenge
eco-conscious event
spectator-friendly
Tips
🌡️water's a brisk 16°C — wetsuit recommended
👥relay teams welcome for the 20km Course du Rohan
🛶each 44km swimmer gets a personal kayak escort
Free
Make it an outing
Add nearby spots before or after your event