The Tro Park Tour takes place each spring in Le-Tour-du-Parc, a commune on the Rhuys peninsula in Morbihan, situated between the sea and the marshes of the Golfe du Morbihan. This event is a local nature-sport day featuring timed trail races, walks, and children's activities, welcoming hikers, young runners, casual walkers, and experienced racers. The adult race options are 7 km and 12 km, with over 80% of the racing on trails and the remainder on road sections. The organizing association, Tro Park Sport Pour Tous, emphasizes environmental care, aiming to respect biodiversity and limit its impact.
The routes traverse the commune's main areas and incorporate significant portions of the GR34 coastal hiking path. The 7 km course offers a less demanding option, suitable for those wishing to view the marshes and shoreline without completing the entire loop. The 12 km course circles the commune and presents a more technical challenge. Participants pass by seaside areas, oyster farms, and marshland, contributing to the event's distinct local character. The Tro Park Tour originated from a group of runners and also includes local artisans and businesses, functioning as both a competition and a spring village gathering.