The Trail des Garciaux is a trail race held annually in Saint-Perreux, Morbihan, Brittany, on the last weekend of May. It focuses on natural terrain, offering multiple distances suitable for various skill levels: short, middle, and long trail options, alongside races for children and juniors.
The routes traverse marshes, forests, and thickets within the Oust valley, including sections alongside the Oust river and near the Arz and the Nantes-Brest canal. The 15 km event attracts the largest number of participants, with the 7 km and 30 km routes also seeing considerable local engagement. A longer 35 km option is noted, featuring approximately 600 m of elevation gain. This event is organized by Sport et Nature Perusienne, an association founded by local runners and nature enthusiasts to utilize the natural features of Saint-Perreux, such as its marshes, woods, rivers, and canal paths.