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The starting point is 15 Rue des Baronnes in Rosny-sur-Seine: car park near the nursery school. You can also park on Rue de la Grande Maison.
Alternative route: see section ‘During the walk or nearby’.
(S/E) On leaving the car park, head back along Rue des Baronnes then turn left into Rue de la Vallée des Prés. Next, turn right into Rue de la Grande Maison, then cross it to walk alongside the Ru de Bléry. Then turn left into Allée des Lilas (5th and final small bridge).
(1) At the end of this lane, head right, then cross Rue de Villiers and turn left onto Rue de Lommoye. Cross Rue Roger Salengro; at the next junction, turn right onto Rue Jean Jaurès, then pass under the A13 motorway bridge.
(2) At the end of the street, take the path opposite which leads up towards the forest. At the entrance to the forest, continue straight on along the Chemin des Mouches (wooden sign) and join the first path on the right towards Clos Brocard (wooden sign).
(3) Follow this path (yellow markings), which, after a flat section, descends quite steeply to the road (D114). Ignore the paths coming from the right or left. After passing under a high-voltage power line, at the Fork in the road, head left (yellow markings).
(4) Cross the road and take the path on the left after the information point. At the Fork in the road, turn left. At the next junction, carry on straight ahead, following the valley floor uphill.
(5) Turn right at the edge of the forest. Ignore the path on the right and carry on to the Carrefour d’Ivry.
(6) Turn right and carry on straight ahead to the Carrefour du Roi.
(7) Then take the first path on the left. Carry on straight ahead (north-west), ignoring the first junction (grassy path) at forest plots 40A and 41A. At the next junction (Carrefour du Quinconce), turn right, ignore another junction and you’ll reach the Carrefour Marie-Thérèse.
(8) Take the path on the left. At the next junction, take thethird path on the right (north-north-east) and follow the sign for Rolleboise written in yellow on a tree. Near the A13, first turn right then left and cross the bridge.
(9) Immediately afterwards, take the path on the right, which heads east between two fields. Pass under a high-voltage power line and the transformer, then carry on straight ahead.
(10) After about 75 m, turn left onto a PR® (forest gate).
(11) About a hundred metres further on, leave the PR® and turn right onto a small path (Yellow Cross on a tree). At the end of the path, turn left and then carry on straight ahead to the gazebo (viewpoint).
(12) At the gazebo, take the path on the left (yellow markings). Zigzag along the path, then continue straight on until you reach the junction you passed earlier.
(11) Continue straight on until you reach the forest gate.
(10) At the junction, turn left, go through a forest gate and carry on straight ahead. At the first Fork in the road, after about twenty metres, carry on straight ahead and ignore the path leading down to the left. After about thirty metres, leave the main path by veering left into a meadow. Walk down through the meadow and, after 250 metres, turn right to rejoin the main path (Chemin de la Villeneuve).
(13) Continue straight ahead along Chemin de la Villeneuve. This path veers to the right, between the railway line and the Ru de Bléry. At the junction, turn right to cross the Ru de Bléry and take Rue de la Vallée des Prés. Turn right onto Rue des Baronnes and you’ll reach the car park near the nursery school (S/E).
It's usually very quiet during the week! Motorised vehicles are normally prohibited in the forest... but you sometimes come across a few idiots at the weekend...
I was hiking in Rosny Forest on the 7th!
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