From Pontoise, take the D915 then the D79 towards Livilliers. Park near the church and the town hall.
(S/E) From the car park, leave the town hall on your right and continue straight on. Ignore the first three junctions and pass under a copse for a very short while. You will reach a junction at the second copse (Bois Lapin).
(1) Continue straight on, skirting the copses; ignore the junction on the left (GR®1) and continue along the path until you come out onto the road at a cross.
(2) Turn left onto the tarmac road. Quickly ignore a track on the right to reach a junction.
(3) Turn left into Ruelle Yvaan. Keep right at each junction until you reach Rue Saint-Didier.
(4) Turn left and leave Rue de l’Église on your right to reach Ruelle de la Vanne.
(5) Follow this path, ignoring the first path on the left. Continue straight on until you reach the main road.
(6) Keep left and continue along the path (the D22 is on the right) towards the hamlet of Gérocourt. Cross the hamlet, continue straight on and stay on the path, ignoring two junctions before crossing a stream at Fond de l’Arche. Shortly afterwards, turn left and follow the path to the end.
(7) Turn right and continue straight on until you reach a gate.
(8) At the junction, turn left, cross the D79, then turn left towards Génicourt cemetery. Leave it on your left and continue along the path to the T-junction.
(9) Turn right to reach another junction.
(10) Turn left. Ignore the first path on the left, head down towards the Ravin de la Vallée and cross the first junction.
(11) At the next junction, turn left (GR®1), continue along the edge of the Bois Dame Jeanne on your right and head towards Livilliers. At the end of the path, continue straight on along the A-road to reach the church and the town hall (S/E).