Route along an old railway line. According to your physical condition, several routes are available. From Mirepoix to Lavelanet: about 35 km. From Mirepoix to La Bastide-sur-l'Hers: about 20 km. From Mirepoix to Camon: about 10 km. Take a torch for the route which crosses through several tunnels.
Mirepoix