Country:
District:
Parking in the forest, in a car park located on the edge of the Route Forestière de Diane, which you take from the D3:
- Coming from Saint-Chéron, it is the first track on the right after the hamlet of Bel-Air (do not pass the town exit sign).
- Coming from Les Ulis or Marcoussis, at the "Golf de Marivaux" sign, continue for about 500 metres and take the track on the left after passing the town sign.
(S/E) The car park is marked by sandstone blocks and small cylindrical posts. In the part of the car park opposite the information sign, look for a post with a pink mark (this colour may not remain forever). There is a small cubic sandstone block just behind this post and, just to the left of it, a much larger block. Just behind this group, there is a solitary pine tree and, behind the pine tree, a path leading north. Take this path, which winds its way through the ferns. Ignore the less marked paths that branch off to the left or right.
When the path splits in two, with a small clump of ferns between them, take the left-hand path, which is crossed by a log that forces you to step down a "step".
(1) Join a wider path coming from the left (Quincampoix forest road) and turn right. The path then curves to the left and climbs to reach a second car park at the end of the Quincampoix forest road (first barrier).
(2) Cross the car park keeping to the right (do not take the tarmac road coming from the left). Reach a second barrier. Go past this and take the Route Forestière des Plans du Plessis, which starts with a picnic table on the left and several similar tables on the right.
N.B. There are two parallel paths close to each other. The IGN map indicates the left-hand path (in the direction of travel) as the Route forestière des Plans du Plessis, while a sign on site indicates the right-hand path. Here, we recommend taking the right-hand path.
After about 500 metres, the path turns right and heads south-west. Continue in this direction, climbing gently, until you reach the Carrefour des Cinq Routes (signpost, shelter, information board with map).
(3) Take the Route de Cardon heading south.
(4) Before a sharp left turn, at a pine tree marked with plot number 25, you can reach a viewpoint (with a bench) on the right. Continue on the Route de Cardon, which runs east-southeast. The road passes the Route de Crève-Cœur, turns left and arrives at a barrier. Take the path immediately on the left (north).
(5) Take Route de Diane on the left (yellow signpost). Continue along this wide path, which heads west-northwest. The path descends slightly to reach the Carrefour des Cinq Routes, which you have already passed.
(3) Continue straight ahead uphill. Pass a water tower visible on the right and descend sharply to reach the car park where you started (S/E).
Visorando member
Moderate 
