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Routes
Bike touring routes & trails
France
Ile-de-France
Versailles
Montigny-Le-Bretonneux

La Mérantaise and its washhouse – Méridon Castle loop from Saint-Quentin-en-Yvelines

Routes
Bike touring routes & trails
France
Ile-de-France
Versailles
Montigny-Le-Bretonneux

La Mérantaise and its washhouse – Méridon Castle loop from Saint-Quentin-en-Yvelines

Hard

54

riders

La Mérantaise and its washhouse – Méridon Castle loop from Saint-Quentin-en-Yvelines

05:10

65.7km

700m

Cycling

Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route. The starting point of the route is accessible with public transport.

Last updated: March 20, 2026

Tips

Includes a segment that is highly dangerous

A part of this route comprises highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.

After 16.4 km for 29 m

Waypoints

A

Start point

Train Station

Get Directions

1

7.56 km

La Mérantaise and its washhouse

Highlight • Historical Site

The forest of Port-Royal is distinguished by the pretty landscapes created by the Mérantaise which crosses it. The washhouse set up by the river further embellishes this idyllic setting.

Translated by Google •

Tip by

12.8 km

Viewpoint

Viewpoint

3

16.4 km

Super atypical passage, I recommend

Translated by Google •

Tip by

4

26.8 km

Méridon Castle

Highlight • Castle

You can’t visit it, it is private.
Nice position in the forest.

Tip by

5

29.6 km

Feel free to make the effort to climb to the Château de la Madeleine, you will gain a beautiful view of the Chevreuse Valley!

Translated by Google •

Tip by

6

51.7 km

7

58.6 km

Oratory

Highlight • Other

Not easy but fun

Tip by

8

59.6 km

Farm above Port Royal Abbey

Highlight • Other

On the "Route de Guyancourt", see Ricardo Bofill's construction of the arcades on the Sourderie Lake, in Montigny-le-Bretonneux and walk around it for a viewpoint. Unmissable.

Translated by Google •

Tip by

9

61.4 km

Manet Pass

Highlight • Mountain Pass

Despite its ridiculous altitude of 170m and its complete absence of difficulty, this is a genuine col according to "Le club des 100 cols"; a French association of riders who …

Tip by

B

65.7 km

End point

Train Station

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Way Types & Surfaces

Way Types

22.6 km

15.5 km

10.6 km

9.47 km

6.73 km

617 m

246 m

Surfaces

35.3 km

24.5 km

2.34 km

1.87 km

714 m

677 m

452 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (170 m)

Lowest point (70 m)

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Weather

Powered by Foreca

Wednesday 20 May

23°C

8°C

0 %

Additional weather tips

Max wind speed: 11.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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