The 10 km du Trèfle is a charity road race in Istres, in the Bouches-du-Rhône department of southern France, starting and finishing on the Esplanade Charles de Gaulle. Typically held in mid-April, it covers a standard 10 km, making it suitable for runners aiming for a fast time and those seeking a manageable town race.
The course begins in Istres' historic center, then proceeds via Avenue Aldéric Chave toward the Étang de Berre. Participants then circle the Étang de l’Olivier before returning via a new pedestrian path to the finish. The event supports solidarity fundraising, and its route connects two local lakes and the old town within a single, compact run.