The Dolmen des Trois Pierres and the Réveillon Valley

The main destination of this hike is an imposing Neolithic dolmen. Passing through woods and fields, it also offers the opportunity to discover two charming villages in the Réveillon Valley.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 8.89 mi
  • ◔
    Average duration: 4h 45 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 719 ft
  • ↘
    Descent: - 715 ft

  • ▲
    Highest point: 476 ft
  • ▼
    Lowest point: 213 ft

Photos

Description of the walk

Start from the centre of the village of Delincourt. Park in the spacious car park accessible via a stony track that starts opposite the school (signposted).

No signposting

(S/E) Follow the short access track to the car park in the opposite direction to return to the village centre. Turn right and walk round the church via the Enclos Jacques Seïté. With your back to the church entrance, head right (north), noting a washhouse on your right.

Yellow signposting

At the junction immediately after, turn right onto Rue du Mesnil. Ignore the dead-end roads on the left and walk alongside a stream on your right. At a bend to the left, move away from the stream and finish crossing the hamlet. At number 528, ignore a path branching off to the right; the tarmac then gives way to a track.
(1) At the fork in the road that appears immediately, turn right onto a path that runs on level ground between the fields. After a section where the path is quite overgrown, enter a wood and climb steeply. Further on, continue through the wood along a good, fairly level path.

(2) Leave the woodland and you’ll immediately notice the small menhir known as the ‘Pierre Droite’ on your left. Carry on between the fields until you come out onto a small road (no signposting here).

(3) Turn sharply left and follow the small road. After about 250m, at a fork in the road, take a farm track to the left. After about 300m (at elevation 135), let the track veer to the right and turn left onto a grassy path heading towards a wood (no signpost here). Walk alongside the wood on your left (where you’ll find a signpost) then walk alongside another wood on your right.

(4) At the edge of the woodland, ignore a path coming from the right and continue westwards between the fields (view of Delincourt on the left). At a junction with a small tarmac road coming from the left, carry on straight ahead (no signpost here).

(5) At the next junction, turn right and cross a short stretch of woodland. Stay on the main path, heading north then north-east, alternating between sections along the edge of the woodland and sections through the woodland itself. After a ‘private property’ gate on the left-hand side, ignore a path branching off to the right and walk alongside a golf course on your right. Then head straight down into the woodland and ignore a few tracks off to the sides.

N.B. Between points (6) and (10), the path taken, which remains signposted, does not appear on the IGN base map. The route shown is for guidance only.

(6) At the junction at the bottom of the descent (with a railway bridge opposite), turn left towards the dolmen (signposted but no markers here; the old electricity poles lying across the path are intended only for vehicles). Start by going downhill, then continue on roughly level ground through the woods. Ignore a very overgrown path on the left.

(7) At the next junction, turn left onto a grassy path towards the dolmen (sign). Climb gently and discover the imposing dolmen in the undergrowth.

(8) Retrace your steps.

(7) Back at the junction, turn left and continue through the woods. The grassy path initially turns into a gravel track. Descend steeply and head towards the railway line. Walk alongside a fence on your left, turn left with the path and begin a steep climb.

(9) Halfway up the slope, let the steep path continue straight ahead and turn right to head downhill again (the map is inaccurate here). Then continue on level ground. As you emerge from the woods, turn left and take a track that runs alongside a road construction site below on the right. You’ll reach a junction with a small road.

(10) At the junction (the road opposite is not shown on the map), follow a small road to the left. Climb steeply, taking two bends, and pass a reservoir on the left-hand side. At the top of the hill (horse pastures), continue south-south-east between the fields along the Chemin des Groux.

(11) Cross the Sente de la Grosse Haie and pass another reservoir on your left. Walk along the edge of the woodland, go downhill and enter the woodland. Then continue downhill between the fields. The path gives way to a tarmac road; walk past the Chambors cemetery on your left.

(12) Continue down gently into the village. At the crossroads, take Rue des Sources straight ahead (with a beautiful gate at No. 12). At the end of the street, pass a cross on your right and turn left onto Rue Bertinot-Juel. At the end, walk round the small church at Chambors on the left and follow Rue du Blouet. Walk gently uphill and, at the next junction (an old spring on the right), turn right towards a cross.

(13) At the fork in the road (central cross), take the left-hand street, which continues to climb gently. After the last houses, the tarmac gives way to a track. Note the map of another walk on the right-hand side and continue climbing gently between the fields (lovely view on the right). Enter a wood and walk between two private property fences.

(14) Turn onto the first path on the right, still between two fences (on the same beech trunk, you’ll find a bar, a triangle and a Yellow Cross: follow the bar, which points in the right direction). After walking alongside a large field on your left, you’ll reach a Y-junction (calvary).

(15) Then veer right and head downhill, with Delincourt Church clearly in view. You’ll come out onto a small road; follow it to the right, continuing downhill. At the next junction (cross), veer left

No signposting

Cross Rue du Mesnil on your left – the road you took on the way out – and continue straight on to Delincourt school. Then follow the stony track to the right leading to the car park (S/E).

Waypoints

  1. S/E : mi 0 - alt. 236 ft - Delincourt car park
  2. 1 : mi 0.58 - alt. 282 ft - Fork in the road at the exit from Le Mesnil
  3. 2 : mi 1.55 - alt. 436 ft - Exit from the woods – Menhir of La Pierre Droite
  4. 3 : mi 1.93 - alt. 430 ft - Small road
  5. 4 : mi 2.73 - alt. 440 ft - Corner of a woodland
  6. 5 : mi 3.25 - alt. 423 ft - Crossroads
  7. 6 : mi 4.52 - alt. 322 ft - Crossroads near the railway line
  8. 7 : mi 4.87 - alt. 282 ft - Junction – Access to the dolmen
  9. 8 : mi 4.96 - alt. 328 ft - Dolmen des Trois Pierres
  10. 9 : mi 5.53 - alt. 335 ft - Intersection halfway up the slope
  11. 10 : mi 6.06 - alt. 272 ft - Crossroads
  12. 11 : mi 6.63 - alt. 472 ft - Crossroads – Reservoir
  13. 12 : mi 7.32 - alt. 269 ft - Chambors Cemetery
  14. 13 : mi 7.67 - alt. 262 ft - Fork in the road – Croix
  15. 14 : mi 8.09 - alt. 397 ft - Junction in the Bois des Bouleaux
  16. 15 : mi 8.45 - alt. 394 ft - Y-junction – Calvaire
  17. S/E : mi 8.89 - alt. 236 ft - Delincourt car park

Notes

Access by public transport: (Transilien line J, between Paris-Saint-Lazare and Gisors):
- From Trie-Château station, exit via platform 1 (Paris–Gisors direction) and follow the yellow markings to the junction (10).
- From Chaumont-en-Vexin station, follow the small road on the south side leading to the Bois de Gomersfontaine and join the route at point (3).
Please note: depending on the time of day, there may be only one train per hour or every two hours… For detailed timetables, please visit the Transilien website.

Hiking boots are essential. Part of the walk is across open terrain: in summer, avoid the hottest parts of the day and ensure you have suitable sun protection. The total elevation gain is moderate, but some slopes are quite steep.

There is a bar and small grocery shop in Delincourt (S/E), opposite the church. It is open from Tuesday to Saturday, all day with a break from 1.00 pm to 4.00 pm, and on Sunday mornings.

In the villages or in the woods, signposting is sparse but generally present at the main junctions. Between the fields, it is virtually non-existent due to a lack of suitable surfaces. Therefore, a 1:25,000 map is essential (at the very least, the one accompanying this description).

Additional information and alternative routes:
- Visit to a standing stone (suggested by stan_950) – Facing the antechamber of the dolmen (6), take the path on the left (Yellow Cross). After about 250 metres, turn left onto a track leading to the menhir, which is marked by a triangle on the 1:25,000 map. Retrace your steps back to the junction (7).
- Circular Loop - Right at the start of the walk, at the junction with Rue du Mesnil, continue straight on following the yellow markings. At the next Fork in the road (cross), take the road on the right. When this turns right, leave it and follow a path on the left. Climb up to the Y-junction (15). Then take the path on the right (unmarked) and rejoin the route at the junction (5). This shortened version is approximately 10 km in total.
- Changing conditions on the outskirts of Trie-Château - Depending on the progress of the roadworks just before the junction (10), adapt to the conditions you encounter on the spot. Once the roadworks are complete, it is likely that the junction itself will be replaced by a roundabout...

Walk completed by the author on 8 July 2017.

Worth a visit

- Saint-Léger Church (11th–19th centuries) in Delincourt (S/E).
- Wash house in Delincourt, shortly afterwards (S/E).
- The Pierre Droite menhir (2).
- Dolmen des Trois Pierres (8). Also known as the ‘Dolmen de la Pierre Trouée’, this is a covered passageway that is now notable for its vestibule, topped by an imposing slab and which has retained its porthole-shaped slab.
- Beautiful houses and a small church in Chambors, between (12) and (13).

Reviews and comments

4.7 / 5
Based on 35 reviews

Reliability of the description
4.8 / 5
Ease of following the route
4.7 / 5
Route interest
4.6 / 5
User 18769152
• Edited:

Insufficient signposting. Points of interest not marked. The path to the menhir and the covered avenue is blocked by trees that have been lying on the ground for some time. Barbed wire is blocking access in one place. Disappointed, as this could have been a good walk.

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User 29005730

Overall rating : 4.7 / 5

Date of your route : Jun 29, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Hello,
There’s a stretch of path not far from the dolmen where the path no longer follows the route shown on the map, as they’re currently felling trees!

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User 13267134

Overall rating : 4.3 / 5

Date of your route : May 16, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A lovely, varied route through woodland and across fields along farm tracks. The villages of Délincourt and Chambors are very pretty, with magnificent stone houses.
Two comments to update the guide regarding the track running alongside the railway line (between points 6 and 9):
- The SNCF (or others) has cut down all the trees on either side of the track, and it has been badly damaged by the cutting machinery. The route is therefore much less ‘idyllic’, especially as you’re coming off a lovely forest path.....
- The track we took follows the route on the IGN base map exactly (verified via Iphigénie)

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User 4369764

Overall rating : 4 / 5

Date of your route : Sep 08, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A varied route through woods and fields.

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ozogiminy
ozogiminy

Overall rating : 5 / 5

Date of your route : Aug 08, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Nice walk, Delincourt and Chambors are two charming little villages

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User 3740499
• Edited:

Overall rating : 4.3 / 5

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

Very beautiful route; the description is very precise and clear... fortunately, because the signage is very good in some places and non-existent in others.
Thank you for this beautiful hike.
Nadine

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cattherine
cattherine

Overall rating : 4.3 / 5

Date of your route : Mar 17, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

A little short for us, so we added a passage by château sorting

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yaya95
yaya95

Overall rating : 4.7 / 5

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

hike done on the weekend of 16/17 November - the paths were very passable (little mud) and even on several occasions we found wide, pleasant paths.
This hike could be interesting in summer as there are many shaded areas.
A little surprise: you pass one of the variants of the Compostela trail (Evreux/Chartres): after point 5, as you enter the forest, there is a small stele on the right...
the covered walkway with three stones is nice.
an alternative is to do it in the opposite direction so that the difficult parts are at the beginning.

in any case, it's a pleasant surprise.

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SylvieDelap
SylvieDelap

Overall rating : 4.7 / 5

Date of your route : Feb 21, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A beautiful hike, very well described. The covered walkway is impressive.

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bernard951
bernard951

Overall rating : 4.3 / 5

Date of your route : Sep 24, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful walk with varied landscapes. The dolmen is easy to find and the path to the standing stone was passable.

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Lepontdav
Lepontdav
• Edited:

Overall rating : 4.3 / 5

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

A beautiful hike, alternating between woodland, forest edges and cross-country trails. The description of the hike is very detailed, which is fortunate as there are often no signposts!
This hike is worth doing, if only to see the dolmen at point 6. The path leading from the dolmen to the standing stone is impassable due to numerous trees blocking the way.

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François Thierry
François Thierry

Overall rating : 4.3 / 5

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

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Bonnay
Bonnay

Overall rating : 4.3 / 5

Date of your route : Sep 26, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A very beautiful hike, enjoyable in summer when the weather is warm, with pleasant woodland. Unless I am mistaken, at the start, with the church door behind you, you turn right, so the wash house is on your left and not on your right? A small mistake on my part: at the sign indicating the dolmen at 950 m (no. 9), I turned right and missed no. 10. I arrived at no. 11 by following the app again, but it was no big deal!
Thanks again for this walk

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Salomon kaine
Salomon kaine
• Edited:

Overall rating : 5 / 5

Date of your route : Jan 24, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Well done for the detailed route description, it's really accurate!
We had a very pleasant hike
I would recommend it to everyone
Thanks to the author for this route

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Geono60
Geono60
• Edited:

Overall rating : 5 / 5

Date of your route : Jan 21, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A wonderful walk through woods and fields, with the added bonus of an impressive Neolithic monument. Although it was the middle of winter and nature wasn't at its best, we loved this hike. Just two small details... The road under construction at point 10 is now finished, open to traffic and very busy. Luckily, we only pass by it briefly. The tour of the church, charming as it is, is a little confusing at first, in the literal sense of the word! It is not part of the walk and should be considered a little treat before the real start. The village of Delincourt is really charming, typical of the Vexin region.
Thank you very much for this tour, and well done for the description, which leaves no room for interpretation.

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