The Isle-Adam National Forest and its southern edge

Discover the Isle-Adam National Forest and the agricultural landscapes of the Val d'Oise on its southern edge. The route alternates between forest paths and wide, rolling hills amid cultivated fields and meadows.

Details

99550
Creation:
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  • Walking
    Activity: Walking
  • ↔
    Distance: 22.15 km
  • ◔
    Average duration: 7h 05 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 262 m
  • ↘
    Descent: - 259 m

  • ▲
    Highest point: 194 m
  • ▼
    Lowest point: 33 m

Photos

Description of the walk

Departure

Car park at Maffliers church. You can get there by car or public transport. Montsoult-Maffliers station is about 1.5 km away. On weekdays only, a bus connects the station to the centre of Maffliers (https://www.cars-lacroix.fr/mobilite-urb...).

PR® (yellow) trail markers

Take Rue du Bois Carreau, then at No. 19, turn left onto the path that goes downhill.
When you reach a wider track, turn left, then continue straight ahead and leave thePR® trail, which turns right, a few metres further on.

No markings

(1) Continue straight ahead on the path, which is no longer marked. It winds its way between a field on the left and a wood on the right. You will come to the edge of a field, which you must cross, following in the footsteps of previous hikers to reach the farm track slightly to your right.

PR® markings (yellow)

(2) Turn left and continue to the D64 departmental road at the entrance to Nerville-la-Forêt.

GR® markings (red and white)

(3) Turn left and, a few metres further on, take the path that climbs up to your right. You will pass close to an underground reservoir and turn left to reach a forest road, which you take to the right.

(4) At the crossroads (Poteau de la Tour), take the clay road to the Porte Baillet crossroads.

(5) Cross the N184 bridge and continue along the forest road. Pass the Chêne au Loup crossroads and arrive at the Vicaire crossroads.
Take the second path on the left and continue until you reach the large fence wall of the Parc de l'Abbaye du Val. Turn right.

(6) When you reach the crossroads at the corner of the wall, turn left onto the second path.
This path winds along the upper edge of old quarries. A wooden balustrade has been placed at the edge of the cliff to prevent accidents.
Continue until theGR® turns 90° to the right.

No markings

(7) Leave theGR® on your right and continue straight ahead for about 100 metres, then turn left onto the path that descends.
Pass under a ruined bridge arch and cross the protected wetland area of the Marais de Stors.

(8) At the crossroads, turn left onto the sunken path that climbs slightly. Continue to the boundary wall of Abbaye du Val, turn right, then left and follow this wall to the large entrance gate of the abbey.

(9) Cross the D9 road and, opposite, go up the path to the barrier that closes off Rue du Pavillon de Chasse de Mériel. Follow this street to the end of the cul-de-sac. A pedestrian crossing takes you to the N184 bridge.

(10) Cross the bridge and enter Villiers-Adam via the D1. A few metres further on, continue left along Rue de Mériel and then Rue Patouillard Demoriane.

(11) At No. 31bis, turn left onto Chemin de Stors.
At the crossroads, turn right, then 200 metres further on, turn left to go alongside a farm and continue across the fields to a farm track running parallel to the N104. Turn right, go through the barrier and turn left onto the bridge to cross the N104.
Continue until you reach the bridge on the N184.

GR® markings (red and white)

(12) Turn right onto the farm track closed by a barrier and immediately left onto the path that enters the forest. Continue to the edge of the forest in a hollow.

PR® markings (yellow)

(13) Leave theGR® markings and follow the path that branches off to the left.
A little further on, the path turns right, crosses a large field and turns left to reach a tarmac road.

(14) Cross the tarmac road and continue straight ahead for about 200 metres, then turn right.
The path winds through the forest for about two kilometres to reach the Carrefour Boucault car park.

(15) Take Route Boucault, then turn right at the first crossroads onto Route du Tourniquet de Montsoult.
At the next crossroads, turn left onto Route de la Tente between forest plots 50 and 55. At Route des Deux Châteaux (crossroads located at the junction of plots 51, 52, 53 and 54), do not follow thePR® which turns left: thePR® route has been changed, so follow the description rather than the map.

No markings

(16) Turn right between plots 53 and 54 and continue to a large ruined fence wall, of which only a large metal gate remains. Go around this gate on the right and follow the path that veers left in the middle of a grove of tall rhododendrons (4 to 5 metres high) to reach a track where you turn right.
At the end of this track, cross the Maffliers equestrian centre, pass in front of the château and the Novotel and continue to the large wrought iron gate, which is always open.

PR® (yellow) markings

(17) Turn left onto the path that goes downhill (Rue de la Ferme), which becomes tarmac at the bottom of the descent.
Follow it to the end, cross the crossroads and turn right into Rue de la Forêt, then left into Rue de la Mairie to return to the church car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 154 m - Maffliers church car park
  2. 1 : km 0.68 - alt. 126 m - End of PR trail markings
  3. 2 : km 2.26 - alt. 133 m - Resumption of PR markings
  4. 3 : km 2.85 - alt. 166 m - Start of GR trail markings
  5. 4 : km 3.85 - alt. 194 m - Forest road
  6. 5 : km 5.19 - alt. 107 m - Porte Baillet crossroads
  7. 6 : km 7.66 - alt. 66 m - Corner of the wall
  8. 7 : km 9.25 - alt. 62 m - End of the GR trail markers, continue straight ahead.
  9. 8 : km 9.86 - alt. 39 m - Sunken lane
  10. 9 : km 11.35 - alt. 65 m - Gateway to the Abbey of Val
  11. 10 : km 12.06 - alt. 93 m - N184 bridge
  12. 11 : km 13.1 - alt. 122 m - Chemin de Stors
  13. 12 : km 14.56 - alt. 70 m - Resumption of GR trail markings
  14. 13 : km 15.58 - alt. 81 m - Transition from GR to PR trail markings
  15. 14 : km 16.27 - alt. 94 m - Crossing the tarmac road
  16. 15 : km 18.67 - alt. 122 m - Carrefour Boucault car park
  17. 16 : km 20.19 - alt. 140 m - Allée des Deux Châteaux
  18. 17 : km 21.58 - alt. 174 m - Large gate
  19. S/E : km 22.15 - alt. 155 m - Maffliers church car park

Notes

Hiking boots and drinks.

Worth a 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

4.3 / 5
Based on 13 reviews

Reliability of the description
4.3 / 5
Ease of following the route
4.3 / 5
Route interest
4.2 / 5
daniel92800
daniel92800

A very beautiful hike, mainly through the forest with magnificent colours in autumn, especially when the sun is shining.

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boni92
boni92

Overall rating : 4 / 5

Date of your route : Nov 05, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful and enjoyable day with a group of about twenty people. I encountered a few difficulties at a place called Le Pilon, but quickly caught up. After lunch at La Porte Noire, our group split up, allowing some of us to shorten the route by joining the PR trail after the D9. The two groups met up again a few minutes apart at the starting point thanks to the difference in pace.
The weather was on our side for this walk, which took place mainly in the forest, and at this time of year we were treated to some beautiful colours. There was little tarmac and few hills, but enough to enjoy some beautiful views of the surrounding landscape.
Thank you to the author on behalf of the whole group.

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MAGOO95
MAGOO95

Overall rating : 4 / 5

Date of your route : Aug 21, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Outing for hiking in the forest, no specific sites to see (viewpoints or monuments).

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aldomoro2913
aldomoro2913

Overall rating : 4.3 / 5

Date of your route : Aug 15, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Good description, but sometimes there is a slight discrepancy between the map points and the description. A beautiful forest hike, ideal for a slightly warm day. The noise from the motorway disturbs the end of the hike (probably depending on the wind). Thanks to the author.

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hugo_frais
hugo_frais

Overall rating : 5 / 5

Date of your route : Feb 14, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

I really enjoyed this hike.
As I had time, after crossing the N184 for the first time, I headed north on the Conti road to the Château des Forgets, then came back down via the little Lary road, the Route des Bonshommes, and the new road, at the end of which I found my way back to the path.
An excellent hike in the forest with some nice passages through wide open countryside.
Lots of little surprises such as: a pretty starting point (Maffliers is much prettier than Montsoult), stone bridges and pillars in the middle of nowhere near the Stors marshes, pretty views stretching quite far along the way, lush and surprising vegetation around the quarries, winding paths in a "natural" forest towards Nerville...
Nice, in other words.

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geogeor
geogeor

Overall rating : 4.3 / 5

Date of your route : Jun 07, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A lovely walk in the woods. A slight regret halfway through the walk because you can hear the main road quite clearly.

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Eddy the beast
Eddy the beast

Overall rating : 5 / 5

Date of your route : May 31, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A very beautiful and long walk in the forest of Isle Adam.
At the end of the trail, the gate, which is normally always open, was closed, forcing us to take a commando-style detour!
A very beautiful day in the forest.

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tianaandria
tianaandria

Overall rating : 4.7 / 5

Date of your route : Dec 15, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very beautiful hike!

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fmaisonny
fmaisonny

Overall rating : 4.7 / 5

Date of your route : Apr 28, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A very beautiful hike, almost entirely through forest.

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webmarc
webmarc

Overall rating : 4.7 / 5

Date of your route : May 05, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

Very nice hike.
I preferred it to the northern edge.

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bibi
bibi ★

Thank you for this detailed feedback. I will let the author review it and make any changes to the description that they deem necessary.
Kind regards

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ovil
ovil

Overall rating : 3.7 / 5

Date of your route : Apr 17, 2018
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

This route is much hillier than the one called "the northern edge of the Isle-Adam forest" that we did last week.
The description is inaccurate or incorrect in several places:
- at point 1, the path is marked in yellow (3 markers)
- at point 2, after crossing the field, you must take the farm track on the right (follow the markings) and turn left
further on
- at point 4, turn left before passing in front of the reservoir
- at point 7, continue on the GR which turns right in front of two stone pillars. The right turn in the description is correct
further on
- At point 15, following the markings, you will arrive on the road about 500m before the Boucault crossroads. On the map, the
route goes straight ahead, whereas the markings turn right onto a small path at the edge of the forest
- between 16 and 17, specify the path to take after the metal gate. There is a path to the left at a right angle just after
the gate and another that branches off diagonally a few dozen metres further on. We took the latter path and
arrived in Monsoult, where a mountain biker put us back on the right track. I did not see or recognise the
rhododendrons.
Another concern was that loggers were working along the GR trail after Nerville. We had to climb over trees lying across the path and even wait for another one to fall while it was being cut down.
Despite everything, it was a beautiful walk in the spring sunshine.

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JM95130
JM95130
• Edited:

Before reaching point 2 after the cornfield, we turned right onto a path thinking it was the farm track, but this took us quite far from point 3, so we decided to go straight to point 4 through the forest.
Point 4 to reach the Glaiseuse road is not easy to find, perhaps a mistake on our part, but we couldn't find this path.
Point 7: to reach the path that descends under a ruined bridge arch, we cut across directly, because if we continued straight ahead, we would have come to a closed gate, probably on private property.
This hike is interesting, but it's not easy for beginners, despite our best efforts.
Thank you.

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bibi
bibi ★

Thank you for your feedback. What should be added to the description to make it clearer?
Thank you.

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JM95130
JM95130

Overall rating : 3.7 / 5

Date of your route : Oct 08, 2016
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good

Conclusions identical to those of other hikers: some sections are not easy to find on the map, but you manage fine in the end.
The sections near the A104 and N184 motorways are not particularly pleasant, but they are relatively short.

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