Entre Dunes et Bouchots is a coastal trail race in Hillion, Côtes-d'Armor, Brittany, held annually in mid-April since 2006. It offers four main distances: 9 km (Trail des Marais), 14 km (Trail des Guettes), 27 km (Trail des Hauts du Pont Rolland), and 40 km (Grand Tra Hillion). The event also includes races for children and juniors, extending the weekend beyond long-distance trail runners.
The routes utilize the landscape around Hillion, incorporating coastal paths, sand, marshland, forest sections, and cliffs. The longer courses begin in Dahouët, while shorter races start from the gymnasium in Hillion. The 40 km route features 850 meters of climbing, presenting a challenging trail outing rather than a flat seaside run. Registration is exclusively in advance, with no on-site sign-ups; runners must validate their entry online via the French PPS health form or present an accepted athletics license.