The 5&10km d'Hirel is a road race in Hirel, on the Brittany coast in Ille-et-Vilaine, France. It offers 5 km and 10 km distances on a flat seafront course. The shorter race typically starts first in the morning, with the 10 km following.
The route runs beside the sea, offering views toward Mont Saint-Michel, with Breton countryside also visible. Its flat profile is suitable for runners aiming for a personal best, and the two-distance format accommodates newer runners and those seeking a faster 10 km effort. The race is organized by GGMJ Events and is promoted with the line, “Ready to run on water.”