EnerGemTrail Saint-Jean is a trail running event held in early October in Gémenos, a village in Bouches-du-Rhône, Provence-Alpes-Côte d'Azur. Adult races begin at the Château Saint Jean de Garguier, offering distances from 800m, 1.6km, 2.4km, and 3.2km up to 7.5km, 14km, and 28km. The event also features children’s courses and an 8km Nordic walking option, making it accessible beyond just experienced mountain runners.
The courses lead into the hills above Gémenos, with significant climbing on the longer routes: the 7.5km has approximately 350m of elevation gain, the 14km has about 790m, and the 28km reaches around 1600m. Route names such as La Boucle Saint-Clair, La Boucle de Tuny, and Les 5 Vallons de la Galère contribute to the event's local, Provençal character. It appeals to runners seeking rocky terrain, steep ascents, and a château start, while the shorter children's races ensure family participation.