La Gémenosienne - Gem l'Urban Trail is a 10 km urban trail race held in Gémenos, a town within the Bouches-du-Rhône department of Provence-Alpes-Côte d'Azur. The event takes place in early spring, with typical race-day temperatures ranging from 9 to 15°C.
The start is located in Gémenos, near Marseille. The town hall, in collaboration with Les Belles Gambettes, L’Escapado De Gemo, and GemTriAthlé, organizes this sporting, festive, and charitable local event.