(S/E) With your back to the car park, go straight ahead and cross the Route du Boisdhyver with care.
(1) Ignore the return path on the right. Continue straight on until you reach the Puits de Loisy crossroads.
(2) Turn left onto the GR®1, ignoring the next two junctions.
(3) At the Route de l’Éventail, turn right, leaving the GR®, cross the D922 carefully and walk past Maison Pierette on your left.
(4) At the next junction, turn left; at the Carreau crossroads, turn right onto the Chemin de la Longue Route, ignoring the two paths on the left.
(5) Take the second track on the right, heading north-east.
(6) Cross the Chemin de Thiers and head for the Carrefour d’Ermenonville.
(7) Take thethird road on the right (almost directly opposite), Route de l’Abbaye.
(8) At Chemin de Meaux, turn right and ignore five junctions.
(9) At Chemin de la Mare, turn right and then immediately left onto Chemin du Terrier Bourguignon. Cross the D922 with care, then shortly afterwards the GR®1, and pass two junctions.
(10) Turn right, heading due west, for about 400 m until you reach the original junction.
(1) Turn left, then cross the Route du Boisdhyver with care and arrive at the car park, where there is a picnic area (S/E).