Go straight down the main street of Les Andelys and park in the small car park on the right, just before Le Petit Andely.
(S/E) Take theGR®2(red and white markings) which starts at the back of this car park. Climb steeply up to the top of the cliffs and reach a paragliding launch site.
(1) Follow thisGR® trail along the cliffs. For a long time, you will be riding a roller coaster along the contours of the terrain. This is the most difficult part, but also one of the most beautiful, as the view is often magnificent.
(2) Turn left at an acute angle with the GR®. You will immediately come to a road and follow it downhill to the left to Val Saint-Martin.
(3) Follow the D313 to the right and immediately turn right onto the road that goes uphill. After about 100 metres, take the path on the left (still onthe GR®). The path follows the road from a distance, crossing it twice, then leaves the road on the left and heads straight towards the wall surrounding the castle grounds.
(4) At the wall, turn right and head towards the hamlet of Thuit. Follow the D313 to the left for a few dozen metres.
(5) At the crossroads, take a look at the castle on the left: the gate is magnificent and the castle in the middle of its grounds is worth a look. Then turn right (leaving theGR®2, which continues straight ahead). After about 150 metres, turn right onto a narrow, unpaved road that descends towards the forest (yellow signpost). After a while, ignore the path that starts on the left in a hairpin bend and continue to the wash house.
(6) Leave the main path and take the track on the left. This path leads to the hamlets of Noyers (magnificent farmhouses and some very beautiful houses).
(7) At the crossroads, go straight ahead (south-east) and follow the path that runs along the edge of the forest and the hamlet. You will come out onto a narrow, very quiet road. Follow it to the right. A few metres after a wayside cross, you will reach a magnificent viewpoint over Les Andelys and Château Gaillard.
(8) Continue along the grassy path that descends in line with the road (south-east). The path curves to the left and descends gently towards the road to Petit Andely. Follow the road to return to the car park where you started (S/E).