The 10 Bornes Nature de Conches is a local nature race held in Conches-en-Ouche, Eure, Normandy. It takes place in late June, offering a 10 km trail run and a 7.5 km walk. The 10 km trail is the primary event and the most attended.
The course winds through a natural setting near the Donjon de Conches-en-Ouche, connecting the event to the town rather than a large urban course. The last edition attracted over 100 participants, giving it the atmosphere of a regional Normandy gathering for trail runners, walkers, and those seeking a brief outdoor summer activity.