Heritage along the Brillante and Bernon rivers

This walk will take you along streams and through countryside, valleys and paths to discover the heritage of three charming villages. Beautiful views are also on the menu for this walk.

Details

17653471
Creation:
Last update:
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  • Walking
    Activity: Walking
  • ↔
    Distance: 17.27 km
  • ◔
    Average duration: 5h 35 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 239 m
  • ↘
    Descent: - 240 m

  • ▲
    Highest point: 155 m
  • ▼
    Lowest point: 38 m

Photos

Description of the walk

Seraincourt: 19 km from Cergy-Pontoise via the D14 and D51 and 17 km from Mantes-la-Jolie via the D983 and D913
Starting point: car park in front of Le Centre school at 63 Rue Normande.

(S/E) With your back to the school, head left. Just after a sign for "Rueil commune de Seraincourt", turn immediately left, crossing a small bridge and taking a path that runs alongside a hedge of thuja trees on your right. At the T-junction, turn right and cross a leat to arrive a little further on at Rue du Blanc Moulin, where you turn left.

(1) At the next fork, turn right onto Chemin des Renoulets, then at the T-junction, turn right onto Rue de l'Aulnaie. Then take Rue de la Cavée on the right, ignore Rue Normande and continue along Rue Saint-Jean.

(2) At No. 13, make a quick detour to the left to see a wash house. On your return, turn left onto Rue Saint-Jean. Pass a crossroads and ignore a turn-off to the right. After No. 16, turn right onto a path that runs alongside the Montoir farm and turn left at the next crossroads.

(3) After about 200 m (there is a landscape information table), turn right down a grassy path and then turn left at the next crossroads. Then take Rue des Pâtis on the right.

(4) After No. 8, immediately turn left onto a path (there is a sign prohibiting horse riders and horses) that runs alongside the Ru de l'Eau Brillante. Pass a street on your right and then, at the end, turn right onto Rue de la Colline and continue for about 50 metres.

(5) Make a short detour to the left into Ruelle du Vieux Moulin to see the waterfall. Retrace your steps, turn left, then right into Rue de l'Aubette and left into Rue des Vallées.

(6) At the triangular crossroads, turn left onto Rue de la Bernon, cross the crossroads and continue straight ahead. Ignore the turnings on the left until you reach an X-shaped crossroads. You will see a yellow marker on your left on an electricity pole.

(7) Turn right immediately (there is a yellow marker on a stone on your right). At the next crossroads, continue straight ahead along Chemin de Damply. After about 900 m, turn right at the T-junction.

(8) At the junction with the D 205, turn left. Immediately turn left again into Rue du Moulin des Prés, pass an old mill and continue along the path. Ignore a turn-off to the left. At the end of Chemin de la Croix de Damply (sign), turn right into a cul-de-sac. Continue along a grassy path and a small footpath. At the end of the footpath, turn left. Further on, follow Rue Mégrimont to the right. Cross the D205 opposite the town hall and take Rue de l'Église to the left of it.

(9) Just before No. 7, turn left onto a small path that runs alongside the Bernon stream. Cross a small bridge, continue to the left and then head a little further to the left onto the tarmac path of the Bernon.

(10) At the T-junction, turn left and walk back to see the source of the Bernon. On your return, continue straight ahead to a crossroads where you turn right. Further on, turn left into Rue des Lavandières. At the T-junction, turn right to the church.

(11) Climb the few steps leading up to it, walk along it and then cross the cemetery to exit on the left. A few metres further on, turn right onto a path. Ignore a turning on the left. At the next fork, go down to the right.

(12) At the D205, continue carefully to the left, ignore a turn-off to the right and continue to the crossroads you have already passed.

(8) At the crossroads, continue straight ahead with caution.

(13) Turn left at the first turn, Chemin des Noquets. At No. 34, take a small grassy path on the right, pass by a wash house and immediately turn left, Chemin de la Messe. Cross a street on the left, then a street on the right and go up the cul-de-sac.

(14) At the corner of the castle wall, turn left. At the T-junction, continue right then left towards the school and left again opposite it.

(15) At the triangular crossroads, turn right onto Chemin du Hazay. Ignore the side roads until you reach Impasse Sente de la Tuilerie opposite. At the T-junction, turn right.

(16) At the new T-junction, turn right. Cross the road and walk up Allée des Tilleuls to the castle. Turn left/right onto Rue des Tilleuls towards the church.

(17) Make a quick return trip to see the church and on your way back, turn right onto Rue du Moustier. At the next fork, turn right onto Sente du Marais Duval, which runs along the castle's surrounding wall. At the first fork, continue left. Further on, at the next fork, continue left onto a small path.

(18) When you reach the D43, go up to the left along the hairpin bend of Impasse Bellevue towards the cemetery. At the corner of the cemetery, go down to the right along the path that runs alongside it. Go left for a few metres to cross the D43 at the pedestrian crossing, then go down the few steps and along the tarmac path. Turn left to return to the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 48 m - Car park at 63 Rue Normande - Rû de l'eau Brillante
  2. 1 : km 0.65 - alt. 56 m - Fork - Chemin des Renoulets
  3. 2 : km 1.32 - alt. 63 m - Wash house
  4. 3 : km 2.1 - alt. 85 m - Landscape interpretation table
  5. 4 : km 3.29 - alt. 44 m - Path closed to horse riders and horses
  6. 5 : km 3.58 - alt. 38 m - Ruelle du Vieux Moulin. Towards the - Église Saint-Sulpice (Séraincourt)
  7. 6 : km 3.84 - alt. 38 m - Triangular crossroads. Towards the - Bernon (cours d'eau) - Affluent de la Montcient
  8. 7 : km 5.06 - alt. 86 m - Crossroads
  9. 8 : km 6.69 - alt. 67 m - Circular Damply
  10. 9 : km 8.24 - alt. 81 m - Grassy path
  11. 10 : km 8.9 - alt. 96 m - Source of the - Bernon (cours d'eau) - Affluent de la Montcient
  12. 11 : km 10.05 - alt. 86 m - Église Notre-Dame (Montalet-le-Bois)
  13. 12 : km 11.15 - alt. 75 m - Route D205
  14. 13 : km 11.86 - alt. 69 m - Chemin des Noquets.
  15. 14 : km 12.63 - alt. 107 m - Corner of the castle's surrounding wall
  16. 15 : km 13.66 - alt. 136 m - Triangular crossroads
  17. 16 : km 14.37 - alt. 124 m - T-junction
  18. 17 : km 14.95 - alt. 122 m - Église Notre-Dame (Jambville)
  19. 18 : km 16.63 - alt. 45 m - Route D43
  20. S/E : km 17.27 - alt. 48 m - Car park at 63 Rue Normande

Notes

The Suricate portal
As users of trails and natural environments, you can now play an active role in this initiative by reporting any anomalies you encounter during your hikes: Sentinelles sports de nature.

Markings: a quick reminder.

Other car park: near the town hall, 12 Rue des Vallées.

Picnic: benches and/or tables.
Source of the Bernon.
Park opposite Jambville town hall.
Park opposite Seraincourt school (starting point).

Alternative route: to see the "waterfalls" of an old mill, approximately 400 m round trip
(6) At the triangular crossroads, turn left into Rue de la Bernon. At the next crossroads, turn left and walk to the old mill located before the D 43.

Worth a visit

You will find information panels from heritage trails set up by the French Vexin Regional Nature Park at several points along this walk.

Seraincourt
Saint-Sulpice Church
Rueil Castle
Town hall
This house with its pointed gable covered in wood was the jewellery pavilion at the 1937 Paris Specialised Exhibition. Dismantled and rebuilt, it was donated by Henri Blum, the mayor at the time.
Old mills
Wash house and footbath
Fountain

Jambville
Notre-Dame Church
Castle
Since 1952, it has housed the National Training Centre for Scouts and Guides of France.
2 wash houses

Montalet-le-Bois
Church of the Nativity of the Blessed Virgin
Old mills
Fountain
Bucket fountain
3 wash houses
Bernon Spring

Reviews and comments

4.7 / 5
Based on 12 reviews

Reliability of the description
4.8 / 5
Ease of following the route
4.8 / 5
Route interest
4.7 / 5
COCHARDMOD
COCHARDMOD

Thank you!

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Melodine
Melodine

Overall rating : 5 / 5

Date of your route : Sep 07, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant hike in a beautiful, peaceful setting dotted with a surprising number of small streams and mills. Alternating between shaded and sunny areas.
We didn't meet anyone on the way, even though it was a sunny Sunday.
The description is very accurate. It's impossible to take the wrong path. Thank you!

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COCHARDMOD
COCHARDMOD

Thank you!

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ErdenKauer
ErdenKauer

Overall rating : 5 / 5

Date of your route : Mar 01, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful, varied hike along the water, passing through pretty villages with houses built from Seine stone.
If you follow the suggested route, you will have to walk about ten kilometres before you find a place to stop for a picnic. The nicest spot to sit down and eat is at the source of the Bernon, at point 10.
Thanks to the author for this lovely route.

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COCHARDMOD
COCHARDMOD

Thank you!

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ealet
ealet

Overall rating : 4.7 / 5

Date of your route : Oct 22, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A beautiful hike with plenty of variety (the paths along the streams in the villages are a bonus)
beautiful views of the Vexin region, a few roads but these are not very busy
thanks to the author for sharing this

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COCHARDMOD
COCHARDMOD

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Walker2
Walker2

Overall rating : 4.3 / 5

Date of your route : Sep 19, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful walk between villages in the Vexin region and rivers.

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COCHARDMOD
COCHARDMOD

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heralys
heralys

Overall rating : 4.3 / 5

Date of your route : Aug 20, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful parish-specific to Brittany hike, varied with villages, forest, and meadows.

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COCHARDMOD
COCHARDMOD

It's always a pleasure to share!

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Samico
Samico

Overall rating : 5 / 5

Date of your route : Jun 06, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike, with varied landscapes and lovely views. Thank you for taking the time to share it

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COCHARDMOD
COCHARDMOD

Very nice video! It makes me want to do it again!

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NRBJ
NRBJ
• Edited:

Overall rating : 5 / 5

Date of your route : May 20, 2024
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant route through the ever-beautiful Vexin region, between villages and nature.
It was the day of a big scout festival in Jambville, so there were crowds, but apart from that, you generally see more horses than people 😂
My memories in video

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COCHARDMOD
COCHARDMOD

Thank you!

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