Loop of the Yvette spring

Loop around the source of the Yvette at Les Essarts-le-Roy.

Details

5710550
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 9.48 km
  • ◔
    Average duration: 3h 05 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 139 m
  • ↘
    Descent: - 148 m

  • ▲
    Highest point: 173 m
  • ▼
    Lowest point: 112 m

Photos

Description of the walk

Start from the car park at the Essarts-le-Roy cemetery.

(S/E) Head east and walk along the cemetery on your right.

(1) At the fork, take Chemin de Vaujoyeuse on the left. After about 500 metres, this small tarmac road continues as a dirt track. Leave the path leading to Ferme de Vaujouyeuse on your left. At a fork, keep left.

(2) At the next intersection, turn left. Follow a path between two fences (wet passages) and reach the source of the Yvette, marked by a small statue.

(3) Turn around and return to the previous intersection.

(2) Continue straight ahead. Cross a small bridge over a stream and climb up the other side.

(4) At the top of the hill, turn left (east). The path soon gives way to a street (Chemin de la Butte Rouge) which crosses the village of Les Layes.

(5) At the crossroads (chapel on the right), turn left onto Chemin de l'Yvette. This street continues as a dirt track that descends through the Bois des Layes.

(6) At the bottom of the valley, turn right and cross the Yvette. Then cross the Route de l'Yvette and continue along the Route des Layes. Take thefirst right, Rue du Prieuré.

(7) At the old priory, take a fairly steep path on the left. At the top, follow the wide Chemin de la Porte Dorée on the right. Continue straight ahead for about 1.5 km. Walk along the left-hand side of the Château de la Boissière Beauchamp park until you reach a crossroads.

(8) Take a small path on the right. Very quickly, this path descends a very steep slope (there are steps). At the bottom, you will come to a road. First turn right then left to take a path that leads to Moulin Neuf.

(9) Cross the two branches of the Yvette and climb up the hillside. At a fork, turn right and continue climbing. After about 750 m, you will reach an intersection (small pond).

(10) Turn right, leaving the pond on your left, and you will soon reach a rocky outcrop. Turn back to return to the previous intersection.

(10) Continue along the main path to the south-west. Join a road (Chemin des Beaudoins) and follow it to the right. Cross the hamlet of Les Beaudoins and continue along the road. At the end (chapel opposite), turn right and you will immediately come to a crossroads that you took on the way there.

(5) Turn left and pass the last houses in the hamlet.

(4) At the intersection on a downhill slope, take the path on the left. At the next intersection, go straight ahead and cross a stream. Continue straight ahead and pass under a power line. You will rejoin the tarmac road at La Sartelle.

(1) Continue straight ahead to the cemetery car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 171 m - Cemetery car park
  2. 1 : km 0.19 - alt. 169 m - Fourche
  3. 2 : km 1.29 - alt. 139 m - Intersection
  4. 3 : km 1.5 - alt. 131 m - Sources - Yvette (l')
  5. 4 : km 2.04 - alt. 152 m - Intersection
  6. 5 : km 2.37 - alt. 170 m - Chapelle Notre-Dame-des-Layes (Les Essarts-le-Roy)
  7. 6 : km 3.14 - alt. 123 m - Fork
  8. 7 : km 3.5 - alt. 130 m - Chapelle du Prieuré de l'Yvette (Les Essarts-le-Roy)
  9. 8 : km 5.02 - alt. 166 m - Crossing - Château de la Boissière Beauchamp
  10. 9 : km 5.43 - alt. 112 m - The Moulin Neuf - Yvette (l')
  11. 10 : km 6.43 - alt. 167 m - Mare - Access to a rocky chaos
  12. S/E : km 9.48 - alt. 171 m - Cemetery car park

Worth a visit

Source of the Yvette with the statue: The statue of Yvette (anonymous) symbolically marks the source of the river. It is inspired by a marble statue called "Source de l'Yvette" (Source of the Yvette), the work of Léon Charles Fourquet, born in 1841 in Saint Forget (Yvelines), a friend of Rodin. It is currently on display at the Musée de Dole in the Jura

Chapel of Les Layes: Les Layes, an independent commune of Les Essarts until the Revolution, located in the heart of the Haute Vallée de Chevreuse Regional Nature Park, saw the establishment of its first chapel in 900, dedicated to Saint Evroult, renowned for protecting animals.
Then in 1204, as the commune had grown in size (300 to 350 inhabitants), at the request of the local lord Guy de Chevreuse, the Bishop of Paris founded the first parish there under the name of 'Notre-Dame des Layes'. The original chapel was then replaced by a Latin cross church. Since then, the destroyed church has been rebuilt, slightly more compact, without the transept wings. In the 19th century, it collapsed again, partly. Only the choir and sacristy remain, to which a small, massive bell tower has been added, giving it its compact and sturdy appearance.

Reviews and comments

4.7 / 5
Based on 23 reviews

Reliability of the description
4.7 / 5
Ease of following the route
4.8 / 5
Route interest
4.4 / 5
Lullu Cwon
Lullu Cwon

Overall rating : 4.7 / 5

Date of your route : Jan 24, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

We really enjoyed this hike! It's fun to discover the source of the Yvette. We also got to say hello to some cute calves, see herons flying, and admire the first snowdrops. It must be said that the statue at the source is a little neglected, but at least it's there 😃
We wanted to believe in the rocky chaos at point 10, but it doesn't seem to be there.
Thank you to the person who suggested the walk, it made for a lovely outing 😊

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hamha
hamha
• Edited:

Overall rating : 4 / 5

Date of your route : Dec 01, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Towards the end of the hike, in the description tab, there is a reference to a rock formation. This no longer exists (probably covered by nature) and there is no point in going there.

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BRUNO1
BRUNO1

Overall rating : 4.7 / 5

Date of your route : Sep 13, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

A pleasant route through woods, meadows, hamlets of millstone houses and old chapels.
The detour at point 10 to see a rocky outcrop is of little interest.

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RV94800
RV94800

Overall rating : 4.7 / 5

Date of your route : Apr 21, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

A very pleasant hike to do in summer when it's very hot, thanks to the many sections through the woods. There's a bit of elevation gain, but it's very manageable. The statue at the source of the Yvette is worth seeing. I didn't go to see the rock formations after reading the other reviews.
Can easily be done in 2½ hours.

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Sylvain Del
Sylvain Del

Overall rating : 4.7 / 5

Date of your route : Apr 21, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A very pleasant route through varied landscapes.

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lïbë
lïbë

Overall rating : 5 / 5

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

A beautiful hike with varied terrain and landscapes. And, of course, the reviews left at point 10 make you want to go and see for yourself! The access is a bit muddy, not very rocky but very uneven. You can almost imagine goblins within reach... We really enjoyed it.

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Mamjor
Mamjor

Overall rating : 4.7 / 5

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

This circuit is a wonderful discovery, especially the source of the Yvette marked by a statue... it feels like being in an episode of Zelda.
However, and this is the only downside, the short detour that is supposed to lead to a rocky outcrop is completely pointless, as there is absolutely nothing to see on that side.
A hike worth doing, and one that I recommend.

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junot
junot

Overall rating : 5 / 5

Date of your route : May 11, 2024
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 with a varied route, mostly through wooded areas.

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Gilles Drevet
Gilles Drevet

Overall rating : 5 / 5

Date of your route : Feb 17, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A very beautiful hike with varied terrain and no major difficulties. Interesting small heritage sites between hamlets and countryside. Must be very pleasant in summer due to the vegetation and cool temperatures.

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randojocelyne
randojocelyne

Overall rating : 5 / 5

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

Superb hike! And that statue... it's incredible! You really don't expect it!
Well done!

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Princesse78
Princesse78

Overall rating : 4.7 / 5

Date of your route : Oct 21, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Beautiful autumn colours

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rawet
rawet

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

A pleasant, sunny short hike. Finishing the route along the Yvette river is a bonus.

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LydieL.
LydieL.

Overall rating : 5 / 5

Date of your route : Aug 21, 2023
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, a change of scenery, varied landscapes, passing through charming little villages

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sebf_98
sebf_98

Overall rating : 5 / 5

Date of your route : Aug 14, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A lovely walk through woodland with varied terrain.

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reydom
reydom

Overall rating : 4.7 / 5

Date of your route : Feb 09, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Very diverse hike, interesting to see the source of the Yvette river

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