Around Boissy-l'Aillerie

de fr

Between town and countryside, this walk is mainly marked by yellow PR® markers.

Details

n°17663
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  • Walking
    Activity: Walking
  • ↔
    Distance: 13.53 km
  • ◔
    Average duration: 4h 15 
  • ▲
    Difficulty: Moderate
  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 123 m
  • ↘
    Descent: - 126 m
  • ▲
    Highest point: 147 m
  • ▼
    Lowest point: 40 m
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Description of the walk

The start and finish of this 13 km hike is the car park at Boissy-l'Aillerie station.

(S/E) From the car park, turn right onto Avenue de la Gare, go to the war memorial and turn left onto Rue de la République (PR®)

(1) Go uphill following thePR®, then turn left onto Chemin de Rochelle.

(2) Follow thePR®, which will take you to the edge of the Cormeilles en Vexin aerodrome runways.
On the old concrete runway, walk along the airfield runways on your right, heading towards Cormeilles-en-Vexin.

(3) At the end of the runway, before entering Cormeilles, turn left onto Rue des Terres Rouges, following the PR®.
Then turn right onto the path (Ruelle des Murs) which will take you to the main road in Cormeilles-en-Vexin (Rue Curie).

(4) Turn left, following thePR®, then left onto Rue Guynemer, which leads behind the village church.
After going around the church, leave thePR® and turn left onto Rue de Montgeroult.

(5). At the village exit, continue along the road until you reach the entrance to Montgeroult, leaving the Bois de la Futaie on your right.

(6) Take Route de Cormeilles, pass in front of the cemetery and on the right in front of the Château de Mongeroult.

(7) Join the PR®. At the end of Rue du Fruchot, take Rue du Raidillon, which leads to a level crossing at the entrance to Courcelles-sur-Viosne.

(8) From there, follow Rue du Moulin and thePR® markers to the car park at Boissy-l'Aillerie station, after passing through Courcelles-sur-Viosne (Rue de la Libération then Rue de la Source) and a detour into the countryside.

(9) Pass the pumping station. This part of the route includes a short climb through the woods. Return to the station car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 43 m - Car park - Gare de Boissy-l'Aillerie
  2. 1 : km 0.3 - alt. 40 m - Rue de la République - Viosne (rivière) à finaliser
  3. 2 : km 0.86 - alt. 72 m - Chemin de Rochelle
  4. 3 : km 4.65 - alt. 109 m - Rue des Terres Rouges
  5. 4 : km 5.64 - alt. 142 m - Rue Curie
  6. 5 : km 5.96 - alt. 147 m - Exit the village
  7. 6 : km 9.29 - alt. 90 m - Route de Cormeilles
  8. 7 : km 10.01 - alt. 77 m - Mongeroult Castle
  9. 8 : km 10.48 - alt. 43 m - Level crossing - Gare de Montgeroult-Courcelles
  10. 9 : km 11.48 - alt. 45 m - Pumping station
  11. S/E : km 13.53 - alt. 43 m - Car park - Gare de Boissy-l'Aillerie

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.

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Reviews and comments

4.4 / 5
Based on 16 reviews
Reliability of the description
4.6 / 5
Ease of following the route
4.6 / 5
Route interest
4.1 / 5
COLIBRI93
COLIBRI93

Overall rating : 4.7 / 5

Date of your route : Apr 23, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A hike that actually covers a lot of roads. We pass along the old disused airport road that runs through the middle of the fields. From Cormeilles en Vexin to Montgeroult, it is a small, quiet road that crosses a section of forest at one point.
There is very little shade, so it is best to avoid hot days.
However, in spring, you can't get enough of the beautiful views of the fields.
We cut this hike short to catch the train at Montgeroult-Courcelles station.

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Jean-Claude-2
Jean-Claude-2

Overall rating : 4 / 5

Date of your route : Nov 03, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average
Very busy route : No

Hello. The route includes a lot of road. Initially, I modified it to avoid a long stretch through town with a hill at the beginning. Otherwise, it's fine but monotonous. Best regards. Jean-Claude

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Totdu
Totdu

Overall rating : 5 / 5

Date of your route : May 09, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Accessible to everyone, up to Cormeilles and on the way back, a beautiful view of Paris, the Eiffel Tower and La Défense.
It's a shame that we are on a quiet country road (with little traffic), which means we have to walk in single file.
What's more, the "Myballade" app provides explanations about the local heritage and history.
Walking while learning is for the curious!

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Jacquemar
Jacquemar

Overall rating : 4.7 / 5

Date of your route : Feb 28, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A pleasant and easy hike as it is not very hilly.
On the way back, it's a shame to walk on tarmac, but it's still a quiet country road.

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Randomartialou
Randomartialou

Overall rating : 4.7 / 5

Date of your route : Jan 07, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A lovely walk, but unfortunately a bit too much road on the way back.

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clo9547
clo9547

Overall rating : 5 / 5

Date of your route : Dec 14, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Very pleasant and easy route

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Dilou59
Dilou59

Overall rating : 4.7 / 5

Date of your route : May 24, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Passing through beautiful villages. The hike would be even better if you followed the PR8 trail throughout to avoid walking on the small road that leads to the village of Montgeroult.

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valdoiserando
valdoiserando

Overall rating : 4.3 / 5

Date of your route : Aug 27, 2018
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

allows you to discover unexpected, pleasant and shaded paths in the middle of the city

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gazok54
gazok54 ★

Thank you, FicellePicarde. It's fine that you don't find it interesting. But does that call into question the quality of the description and the map?

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FicellePicarde
FicellePicarde

Overall rating : 2.7 / 5

Date of your route : Apr 02, 2017
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★☆☆☆ Disappointing

This hike is not particularly interesting, except for the last third of the route.
We made a slight change at the beginning, choosing to bypass the village by going through the woods at the very start of the walk.
Disappointing because there was a lot of road and not much real nature.
I won't be doing this hike again.

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Perrine LB
Perrine LB

Overall rating : 5 / 5

Date of your route : Nov 27, 2016
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

You just need to be careful when leaving Boissy, as the sign for the Chemin de la Rochelle is hidden by bushes...
A very good, peaceful walk through pretty villages.
Also check the train timetable from Paris-St Lazare, as the train we had planned to take at 9.57am was simply cancelled...

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gazok54
gazok54 ★
• Edited:

We would like to thank you, Joelle C&R, for your feedback. The route has been updated with additional waypoints and street names as per your suggestion.
Now we'll wait for new comments to see if these details have been helpful (which I have no doubt they will be )

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joelle C&R
joelle C&R

In any case, thank you very much for making this proposal

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gazok54
gazok54 ★

Thank you, Joelle C&R
This walk is quite old and needs updating. I'll put it aside and take care of it soon, adding the street names as you suggested.

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joelle C&R
joelle C&R

Overall rating : 4.3 / 5

Date of your route : Aug 07, 2016
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A pleasant walk, but best done when the sun isn't too strong: the concrete path along Cormeilles aerodrome was challenging, as was the road between Cormeilles and Montgeroult.
A few details about the route: where possible, it would be helpful to give the names of streets or paths to help with navigation: On Chemin de Cormeilles, follow the PR (Chemin de Justice or, a little further up, Chemin de la Rochelle).
At the entrance to Courcelles sur Viosne, specify the names of the streets to take (rue de la Libération, rue de la Source).

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