From the church of Saint-Yon to that of Saint-Sulpice-de-Favières

A mainly forest route with two beautiful heritage sites: at the start, the charming church of Saint-Yon and a Gallo-Roman ruin, and halfway along the route, the superb Gothic church of Saint-Sulpice-de-Favières.

Details

1708462
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  • Walking
    Activity: Walking
  • ↔
    Distance: 8.28 km
  • ◔
    Average duration: 2h 45 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 122 m
  • ↘
    Descent: - 129 m

  • ▲
    Highest point: 150 m
  • ▼
    Lowest point: 85 m
  • ⚐ Country: France
  • ⚐ District: Saint-Yon (91650)
  • ⚑
    Start/End: N 48.558205° / E 2.187937°
  • ❏
    IGN map(s): Ref. 2216ET
  • Hour-by-hour weather

Photos

Description of the walk

Departure from Saint-Yon Church, located on a hill at the end of a small road off the D19. Parking at the foot of the church.

Red and white markings

(S/E) Take a good path heading south, leaving the old Porte des Bourdeaux and an information sign on your right. Ignore a path on the left and continue straight ahead (east) along the wall of a property. Go through a forest gate, down a sunken path and under a small private bridge. Ignore another path on the left (elevation 129), go through a forest gate and continue along the edge of a fenced garden.

(1) At the crossroads, continue straight ahead and immediately turn right (south) onto Chemin de la Procession. At the next intersection, go straight ahead, pass a forest gate and enter the woods. Wind your way along a good path, first through a deciduous forest and then through a pine forest.

(2) At the crossroads, turn left (due east) and follow theGR®655slightly downhill. Pass through a forest gate and come out onto a wide path, which you follow to the left.

Without signposts

(3) At the first houses, turn right onto Chemin de la Forêt (let theGR® turn left). At the next fork, keep right again (forest gate, dead end).

Yellow signposts

(4) At the end of the path, turn right at an acute angle and follow the cemetery wall on your left. Walk along horse pastures and then re-enter the woods. Ignore two paths on the right and follow a fence on your right.

Red and white markings

(5) At the fork, turn right and walk along a low white house on your right (no. 36). Further on, walk along a fenced garden on your left. In the woods, the slope becomes steeper and the path becomes narrower, dominated by a few sandstone blocks on either side. At the top, turn right and continue on flat ground for about 100 metres. Then take thefirst path on the left (elevation 147).

(6) At the next junction (not clearly marked), go straight ahead. Further on, start descending along a sunken path (the tall silhouette of Saint-Sulpice Church can be seen through the branches). Leave the woods, with the church clearly visible, and continue downhill between the fields and then along a narrow lane. At the stop sign, turn right onto the main street (Rue du Four à Chaux on the map). At the side of the church, leave the signposts for a moment and turn left to reach the front of the church.

(7) Facing the church, turn left and then right twice to complete the loop. Back at the side of the church, turn left onto Rue Alphonse Lavallée and follow theGR® 1 and 655 signs. At the crossroads (large white gate opposite), turn left.

(8) After a few dozen metres, before a forest barrier, turn right. Climb up the embankment on the right, then between the sandstone blocks. The numerous "Private Property" signs along the path are a better guide than theGR® markers themselves! At the top, turn left, then immediately right. Begin the descent.

(9) At the fork, follow the Chemin de la Sablonnière to the left. Continue downhill, keeping north-west and ignoring all the paths branching off to the sides. At a T-junction, turn right onto the Chemin de la Ferté.

(2) At the crossroads you took on the way there, turn left and follow theGR®1. Leave the woods, continue straight ahead and then turn left.

(1) Follow Chemin de la Folie westwards. Continue straight ahead, pass a forest gate, climb uphill, pass under the small private bridge again and then a forest gate. Continue on the main path to return to the church of Saint-Yon (S/E).

Waypoints

  1. S/E : km 0 - alt. 143 m - Church of Saint-Yon - Porte des Bourdeaux
  2. 1 : km 0.81 - alt. 108 m - Chemin de la Folie - Chemin de la Procession
  3. 2 : km 1.47 - alt. 117 m - Chemin de la Procession x Chemin de la Ferté
  4. 3 : km 1.92 - alt. 101 m - Fourche - Chemin de la Forêt
  5. 4 : km 2.18 - alt. 99 m - Boissy cemetery
  6. 5 : km 2.73 - alt. 103 m - Fork
  7. 6 : km 3.75 - alt. 149 m - Crossroads
  8. 7 : km 4.89 - alt. 92 m - Eglise de Saint-Sulpice-de-Favières
  9. 8 : km 5.37 - alt. 87 m - Intersection
  10. 9 : km 6.24 - alt. 138 m - Fourche - Chemin de la Sablonnière
  11. S/E : km 8.28 - alt. 143 m - Church of Saint-Yon - Porte des Bourdeaux

Notes

Hiking boots are recommended.

The route crosses several private woods. This is regularly indicated by numerous perpendicular paths that are firmly blocked and numerous "Private Property" signs on the sides: do not stray from the marked path, as the welcome may not be very warm in the undergrowth...

No water sources have been identified along the route. Restaurant in Saint-Sulpice-de-Favières, Place de l'Église (7), open for lunch from Wednesday to Sunday, and in the evening on Friday and Saturday.

A detailed map is required (at least the one accompanying this description).

Hike completed by the author on 6 January 2019.

Worth a visit

- Church of Saint-Yon (13th century, restored inthe 19th century) (S/E).

- In the cemetery adjacent to the church, monumental tomb of Maurice Morel (1885-1972), nicknamed the King of the Hard Toe, due to his invention that reinforced the toes of shoes and made him a fortune.

- Porte des Bourdeaux (S/E). Remains of an ancient city wall dating from the Gallo-Roman period.

- Saint-Sulpice Church, in Saint-Sulpice-de-Favières (7). Built inthe 13th century, entirely in Gothic style, it was the site of many pilgrimages. Simple layout, without a transept; buttresses and gargoyles on the outside; a choir with a ribbed vault and a barrel-vaulted nave; very bright interior; well in the Chapel of Miracles. The church is open during the day. N.B. Services are held every Sunday and on public holidays at 11 a.m.: on these days, it is best to visit at another time.

- Pleasant forest paths, decorated with sandstone blocks.

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

4.9 / 5
Based on 46 reviews

Reliability of the description
5 / 5
Ease of following the route
5 / 5
Route interest
4.7 / 5
patrickvial91
patrickvial91

Overall rating : 5 / 5

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

very pleasant, several points of interest and easy route

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Youmino9172
Youmino9172

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

A pleasant, well-shaded route in this hot weather, with a visit to the superb church of Saint-Sulpice de Favières, which is definitely worth a detour. Just before you get there, you can pick some delicious blackberries. The route is mainly through woodland, with no difficulties and dry at this time of year. Not too crowded, with just a few mountain bikers and a dozen or so hikers encountered along the way. Near the car park, don't forget to visit the cemetery to see the imposing tomb of R.D.B.D., which stands for "Roi Du Bout Dur" (King of the Hard End). Maurice Morel (1885-1972), who is buried here, was the inventor of safety shoes.

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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

A very pleasant walk, ideal in this hot weather.
It looks quite similar to the Fontainebleau forest in places.
To avoid retracing my steps, after 9 instead of turning right, I turned left towards La Heronniere
at the T-junction, I turned right (blue signpost) to rejoin the GR and turned right again to return to the starting point.

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User 18576123

Overall rating : 5 / 5

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

A very pleasant walk through the forest and fields. The route and description are well detailed and easy to follow. An added bonus on this day was the exhibition in La Chapelle des Arts.

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CélinetYann
CélinetYann

Overall rating : 5 / 5

Date of your route : Apr 20, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Very pleasant hike with lots of forest, short stretches through rapeseed fields, seas of wild hyacinths...we highly recommend it!

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SOFIA MARMOTON
SOFIA MARMOTON

Overall rating : 5 / 5

Date of your route : Jan 30, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

I already did this hike in autumn but in the opposite direction. It was just as enjoyable, very wet at this time of year and sometimes flooded, so wear high, waterproof boots. I'll happily do it again in spring.

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Thierryvdm
Thierryvdm

Overall rating : 4.3 / 5

Date of your route : Feb 03, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Well-explained route
Lots of sections with water
But you wouldn't know that 👌

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GTania
GTania

Overall rating : 5 / 5

Date of your route : Dec 05, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful route, highlighted by the Saint Sulpice church in Favières

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SOFIA MARMOTON
SOFIA MARMOTON

Overall rating : 5 / 5

Date of your route : Oct 14, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Great!!!

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carlablue91
carlablue91

Overall rating : 5 / 5

Date of your route : Jun 17, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

This is another variation on the St Sulpice hike, with a few climbs but no particular difficulties. A very pleasant walk in this quiet area that I love.

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Gilles Drevet
Gilles Drevet

Overall rating : 5 / 5

Date of your route : Mar 22, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A beautiful, easy hike with some gentle hills. The village of Saint Sulpice is very pretty, with a magnificent basilica. There are a few alternative routes you can take.

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AERIR
AERIR

Overall rating : 4.7 / 5

Date of your route : Sep 18, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Access to the church of St-Yon by car is not easy to explain. We took the route from St-Sulpice, which is easy to find (car park clearly marked on the IGN map), via La Heronnière, which avoids passing points 1 and 2 twice

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Louis_A_M
Louis_A_M

Overall rating : 5 / 5

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

accurate description of the terrain
no significant difficulties, just take care to stay on the path to avoid trespassing on private property, which is clearly marked
you should do this walk in the direction described on the information sheet to enjoy discovering the magnificent splendour of the church of St Sulpice de Favières as you emerge from the woods
on this beautiful Sunday afternoon, we had the pleasure of meeting the priest, dressed in his cassock and very welcoming, on the church square, which is definitely worth a visit

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Karine. L
Karine. L

Overall rating : 5 / 5

Date of your route : Apr 16, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

It was a first for us.
We really enjoyed it 👍
We'll definitely do it again 😉

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CHANNIE
CHANNIE

I found another article online (Cemeteries of France) that mentions metal reinforcements for shoes. There may have been two stages in the invention. And the mausoleum is quite remarkable in itself.
Best regards.

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