The tour of the great oak trees in Saint-Nom-la-Bretèche

Around Saint-Nom-la-Bretèche station - Marly Forest, a walk in a beautiful deciduous forest. It suffered greatly from the great storm of 1999, which flattened the oak trees on the motorway like straw, but this hike has a high density of remarkable trees (oaks, hornbeams, beeches). As the Marly forest is crossed by several busy roads, this hike focuses on the quietest part. It also offers a few viewpoints.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 12.22 km
  • ◔
    Average duration: 3h 55 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 154 m
  • ↘
    Descent: - 146 m

  • ▲
    Highest point: 180 m
  • ▼
    Lowest point: 108 m

Photos

Description of the walk

Departure from Saint-Nom-la-Bretèche - Forêt de Marly station.

(S/E) Coming from Paris, exit at the front of the train and cross the level crossing to the left. Walk up the street between the two stations, cross the bridge over the Grande Ceinture line and turn right. Take the path marked in white and red (GR®) and yellow and red (GRP®) that runs alongside the railway line (heading north, i.e. away from Paris).

(1) Continue straight ahead on theGRP® (yellow and red) and leave theGR® on your left as it climbs uphill. At the Étoile de la Maison Rouge (plot no. 12), continue uphill to the right, following the signs, which curve to the right (north-east).

(2) At a crossroads, turn left at a right angle (north) and uphill, following the yellow-red markings. About 500m further on, shortly after passing No. 87, you will arrive at the wide Route de la Claire (No. 86). Turn right at a right angle (east-northeast) and continue until the first crossroads, the Étoile de la Claire Forêt.

(3) At the Étoile de la Claire Forêt crossroads, there is a remarkable oak tree with a large base, marked No. 93, in the foreground of a large clearing surrounded by oak trees, with a picnic table.
From this crossroads, continue in the same direction (east-northeast). Pass the Étoile du Chêne au Chât (like châtaigne). You will come to a fence enclosing a beautiful oak tree and a reservoir. Turn left (north) immediately after. At the next crossroads (No. 92), turn left (west) along a ruined wall.
after 200 metres, you will come to a crossroads with several paths (numbers 92 and 93). Continue for another 50 metres in the same direction.

(4) On the left, slightly hidden by vegetation, you will see a huge oak tree: a truly impressive tree, both for its diameter and its straight trunk and crown.

Return to the crossroads and take the path on the right (south then south-west). On the slope, take the first narrow, little-used path on the right at a right angle (north-west). Cross the D98 (be careful, traffic is fast). On the other side, continue in the same direction (north-west) until you reach a large crossroads with a paved road that is accessible to cars but not very busy.

(5) Note the magnificent red beech tree on the right. Follow the road to the right until you reach the forest house: opposite is a cedar tree.
Return to the crossroads.

(5) Turn right and continue along the road you arrived on (north-west), downhill. At the end of the lane, at the Étoile de Fourqueux (no. 82-76), note a forked oak tree. Turn left at an obtuse angle (west). About 75m further on, at no. 76, turn diagonally right (north-west), along the wall of a golf course.

(6) On the left side of the path, you will see the Frédéric Fountain (padlocked). Continue along the wall. Pass No. 75. When the wall turns right, continue straight ahead (northwest) until you reach the Étoile du Loup (No. 74).

(7) Then take the second road on the right, which is wide and heads north. Further on, it curves to the left (north-west).

(8) At the Étoile de Montaigu, take the second path on the right, i.e. 45° to the right of the paved road. About 100 metres further on, on the left of the path, you will find the Fontaine de l'Étoile de Montaigu. The shelter for the fountain itself is accessible below, behind the sign. Continue along the same path.

Walk along a pond on your right and turn left as soon as possible at a right angle onto a small path (north-west). At the edge of plot 68, turn left again at an obtuse angle (west-north-west). Cross the tarmac road you came from, then take a well-marked path that cuts diagonally across. About 100 metres further on, at number 66, turn right at a right angle (south-south-west). Continue in the same direction for 600 metres, crossing two paths.

(9) The main path turns left at a right angle (east-southeast). After about 100 metres, take a left to explore the ruins of the Château de la Montjoie. Continue along the path and you will soon come to a wide perpendicular path: follow this path to the right (southwest). Pass between two yellow gas pipeline markers.

At the Étoile de la Montjoie (n°62-63), you will find yourself in front of a steep, intimidating climb, which you should not take: continue for a few metres then turn right at an obtuse angle (west-northwest) onto a little-used path (remains of yellow-red markings). Continue straight ahead until you come to the wall of a golf course and the Porte de Joyenval (closed).

(10) Porte de Joyenval. Turn left uphill (south-southwest). When the wall turns right (No. 61), follow it (west-northwest). After 500m, past Nos. 54 and 61, the path curves left (southwest) at Nos. 52 and 54.
300m further on, at no. 52, the wall turns right.

(11) Here, turn left, heading south-west, then south. The path joins a more marked track and curves to the left (south-east), then, at numbers 53-52, joins theGR® marked in white and red. From here, follow the white and red markings until you reach your destination.

Note a remarkable oak tree on the left. 200 m further on, at a crossroads, turn left (east). Pass numbers 55-56 and then 60, heading generally east or east-southeast. Cross a paved road (no cars), passing a picnic table on your left and a curious stone mushroom on your right. Continue following the white-and-red markings, which curve to the right (southeast).

(12) About 400m after the mushroom, the marked path bends sharply to the right (south). 100m further on, cross a tarmac road, where you should turn diagonally to the left (pass a picnic table, heading due south). after 400m, cross the D98 (heavy traffic); continue in the same direction, following the white-red markings. At the end of a climb, you will arrive at the Croix Saint-Michel (panoramic view).

(13) The marked path then curves to the right (west) at the edge of the plateau, then to the left (south-west then south-east). Pass numbers 106-107.

In the clearing at Étoile de la Dayade, turn left onto the white-and-red marked side road towards the station, descending east-northeast. Continue in the same direction at Étoile de Maison Rouge No. 110. A few metres further on, rejoin the path you took on the way there.

(1) Follow the path marked in white and red and yellow and red to the right. Cross the railway line again and turn left to reach the station (S/E).

Waypoints

  1. S/E : km 0 - alt. 130 m - Gare de Saint-Nom-la-Bretèche - Forêt de Marly
  2. 1 : km 0.39 - alt. 123 m - Crossroads of the loop
  3. 2 : km 0.77 - alt. 135 m - Climb on the left on Jaune-Rouge
  4. 3 : km 1.43 - alt. 172 m - Remarkable oak tree no. 93, picnic table.
  5. 4 : km 2.58 - alt. 150 m - Remarkable huge oak tree
  6. 5 : km 3.32 - alt. 160 m - Remarkable purple beech and cedar trees
  7. 6 : km 3.86 - alt. 125 m - Fontaine Frédéric
  8. 7 : km 4.38 - alt. 119 m - no. 74; diagonal to the right on a wide road
  9. 8 : km 5.01 - alt. 119 m - Étoile de Montaigu; on the right
  10. 9 : km 6.31 - alt. 135 m - Intersection
  11. 10 : km 6.95 - alt. 139 m - Porte de Joyenval
  12. 11 : km 7.9 - alt. 151 m - Alternative route: towards the Retz desert
  13. 12 : km 9.73 - alt. 170 m - Right-hand bend
  14. 13 : km 10.6 - alt. 170 m - Croix Saint-Michel
  15. S/E : km 12.22 - alt. 130 m - Gare de Saint-Nom-la-Bretèche - Forêt de Marly

Notes

The hike is fairly flat overall, but there are also some good climbs and descents (steep but short). The entire hike is under the cover of deciduous trees.

(S/E) No shops in the immediate vicinity of the station. Vending machine in the station.

(S/E) The Saint-Nom-la-Bretèche - Forêt de Marly station is the terminus of line L (Saint-Lazare), which runs every 15 minutes at weekends. It also serves the Grande Ceinture line from Saint-Germain-en-Laye-Grande Ceinture to Noisy-le-Roi. Parking is available between the two stations or after the bridge over the railway line.

No refreshments available along the way. A few water sources, but they are padlocked.

Worth a visit

Maison forestière de la Porte Dauphine (north of (8)): red cherry tree in the garden.

After (9): Ruins of Montjoie Castle. There is not much left to see: a circular earth embankment about 50 m in diameter (perhaps the remains of the walls) surrounding a deep depression, at the bottom of which are a few stones, possibly forming the base of a keep.

From the point (11), there is a possible detour to the Désert de Retz, 1.7 km away, a picturesque 18th-century garden. Follow the directions for "La Ferme de Retz" on the map: north-west, then south-west, then north-west, then north-east. The Désert de Retz is open on Saturdays from 2pm to 6pm from April to October, admission fee applies. Allow 1 to 2 hours for the visit.

 Always be cautious and plan ahead when you're outdoors. Visorando and the author of this route cannot be held responsible for any accidents occurring on this route.

The GR® and PR® markings are the intellectual property of the Fédération Française de Randonnée Pédestre.

Reviews and comments

4.4 / 5
Based on 42 reviews

Reliability of the description
4.4 / 5
Ease of following the route
4.5 / 5
Route interest
4.4 / 5
ozogiminy
ozogiminy

Overall rating : 3 / 5

Date of your route : Jun 18, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★★☆ Good
Very busy route : No

A bit tricky between points 8 and 10, difficulty finding the Fontaine de l'Etoile de Montaigu, no sign as seen in the description, didn't see a small path on the left, turned left at the first crossroads, which is the path that crosses the road.A little further on, it was difficult to see where to turn left as the path was poorly marked. I couldn't find the ruins of the Château de la Montjoie.
At the Etoile de Montjoie crossroads, which is also poorly marked, make sure you take the right path. There is a fork between a path that goes uphill (red and yellow markings) and another that goes flat. Take the flat path to the golf course wall, then it's easier until you find the GR markings again.
Note that you leave this GR to follow the access path that descends towards the station.
I had to retrace my steps several times, but it was still a pleasant walk in the shade on this hot day.

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ALouB
ALouB

Overall rating : 4 / 5

Date of your route : Mar 31, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

a hike just as we wanted, close to western Paris, in the forest, with beautiful oak trees, but we got a little lost... the star landmarks weren't all marked

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ThomBalard
ThomBalard

Overall rating : 4 / 5

Date of your route : Jan 17, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

It was nice to discover the Marly Forest, which I didn't know, and some remarkable trees. Unfortunately, many muddy, impassable sections spoiled the fun. I had to go around the path in many places to avoid getting stuck.
I'll definitely come back when it's drier.
Anyway, thanks for the walk!

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Maqroll
Maqroll
• Edited:

Overall rating : 4 / 5

Date of your route : Nov 03, 2024
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Hike completed on the first Sunday in November, with decent weather (light grey skies).
On some sections, we were alone, and on others we encountered quite large groups.
The hike is pleasant from start to finish without being exceptional. The highlight is that it is almost entirely in the forest, with no urban sections, and what's more, it is accessible by train from the starting point.
There were a few muddy patches but nothing too bad.
We were hoping to see beautiful autumn colours, but there was nothing exceptional: there are many chestnut and oak trees with brownish leaves.
As usual, I didn't read the description and just followed the map (without any kind of GPS). There were no problems with orientation, the route is easy to follow EXCEPT around points 9 and 10 where we hesitated and got a little lost.
PS: I did this walk again a week later (the second Sunday in November) and the colours were much more beautiful; in the meantime, the leaves had turned yellow and the light morning drizzle made them shine.

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Joël Oudart
Joël Oudart

Overall rating : 4.7 / 5

Date of your route : Aug 08, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

X

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jeeppatgen
jeeppatgen
• Edited:

Overall rating : 3.7 / 5

Date of your route : Feb 18, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average
Very busy route : No

Discovered in the rain on 18 February 2024, this hike did not take place in the best conditions.
Very muddy paths and heavy rain dampened the fun we had hoped for.
However, this route is worth revisiting in dry weather, preferably in summer or autumn when the trees are in full leaf.

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shapiro
shapiro

Thanks @DenisT53 for the suggestion to detour between (4) and (5). I'll check it out when I get there and make the change.

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DenisT53
DenisT53

Overall rating : 4 / 5

Date of your route : Jan 28, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Beautiful route with a slight elevation gain
Crossing the D98 is particularly dangerous between 4 and 5
Less dangerous to take the detour via L'Étoile Magnifique as there is a pedestrian crossing and central reservation.
Beautiful oak trees and lovely views
A few muddy sections

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Margu
Margu

Overall rating : 4 / 5

Date of your route : Oct 16, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A beautiful hike that can be done in summer under the shade of trees

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RandoLuc
RandoLuc

Overall rating : 4.7 / 5

Date of your route : Oct 16, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Nice walk, beautiful forest, pleasant route
Neither

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PPG95
PPG95

Overall rating : 5 / 5

Date of your route : Aug 20, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful, shaded walk with some very impressive trees. Be careful at the end, we missed the "detour" towards the station.

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MagTour
MagTour

Overall rating : 4 / 5

Date of your route : Jul 14, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A superb hike to do when it's hot, which was the case for us, as the route is in the forest and therefore shaded.
Even though the hike is entirely in the forest, there are lots of different paths through the woods, which makes it really interesting.

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shapiro
shapiro
• Edited:

Thank you, Françoise L. I will be sure to go back and re-check the route based on your comments.

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Françoise. L
Françoise. L

Overall rating : 4.7 / 5

Date of your route : May 28, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

I've done it twice, once on my own and once with a group of seven people. I found it quite a challenging hike (but that's probably subjective, as it depends on your level and experience), with quite a few ups and downs, especially in the first half, but it's true that you're in the middle of the forest the whole time, which is very beautiful. I noticed a few small errors in the description, as I'm using the paper version. In particular, at point 2, after passing number 87, you need to take the second path on the right, which leads to the Etoile de la Claire Forêt crossroads. This means you leave the GRP (yellow and red) which follows the first path on the right.
Another small error: at point 7, you need to take the third path on the right (not the second), as the first path is not very visible, perhaps because it is hidden by grass and vegetation at the start, but it was very visible on 20 April when I did this hike for the first time (however, it does not appear on the map).
Thank you!

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Jeff Vedder
Jeff Vedder

Overall rating : 4.7 / 5

Date of your route : Mar 27, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A superb hike in the heart of the forest!

Our first outing together in a long time, it seemed pretty easy, but maybe we underestimated it.

There are lots of parking options around the station.

A few difficulties at the start, as is often the case, but after that it was smooth sailing.

Not very busy on a Monday morning in March, of course.

We didn't know that the ruins of Montjoie Castle were there. But it's great that it was marked on the map!

We'd love to do this route again!

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