Les Foulées Sarmates offers three nature runs in Sermaise: 5 km, 10 km, and 21 km. It is designed as a local race day where beginners, casual runners, and stronger trail runners can select a suitable distance. The draw is straightforward: a proper dose of countryside running close to the village.
The routes traverse the natural landscape around Sermaise, including forest tracks, quiet paths, the Orge valley, rivers, open plains, hamlets, ponds, and local historical monuments. Water features and cultural stops add variety beyond a simple road loop. The event also supports a charitable cause, allowing runners to contribute to something beyond their own finish time.