From EPERNAY, take the D 951 (towards Sézanne). At Pierry, take the left onto the D 40, then left again onto the D 10 towards Cuis and follow this road until Mesnil sur Oger, then take the right onto the D 9 and go through Vertus (follow TOUTES DIRECTIONS sign). At the end of Vertus, take the left onto the D 36 (sign AUTRES DIRECTIONS), then left again onto the D 933 (towards Châlons en Champagne). Take the first exit on the right onto the D 36 (towards Trécon). After Trécon, take the right onto the D 236 towards Clamanges.