Châteaufort Washhouse – La Mérantaise and its washhouse loop from Guyancourt

Running trails & routes

France

Ile-de-France

Rambouillet

Voisins-Le-Bretonneux

Châteaufort Washhouse – La Mérantaise and its washhouse loop from Guyancourt

Hard

runners

Châteaufort Washhouse – La Mérantaise and its washhouse loop from Guyancourt

01:49

15.3km

240m

Running

Hard run. Very good fitness required. Mostly runnable paths. Some sure-footedness required. The starting point of the route is accessible with public transport.

Last updated: August 22, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc naturel régional de la Haute Vallée de Chevreuse

Waypoints

Start point

Bus stop

Get Directions

645 m

Parc de la Croix du Bois

Highlight • Natural

A pretty little hidden park, with a rose garden of 1,100 rose bushes and 62 different varieties as well as a superb building currently being renovated, a former hunting lodge …

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Tip by

1.75 km

Hélène Boucher Memorial

Highlight • Other

Coordinates: 48.75101/ 2.05141
Location of Hélène Boucher's accident, on November 30, 1934, at the controls of the Caudron C 430 Rafale N°02 F-AMVB.
aerosteles.net/stelefr-magny-boucher

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Tip by

7.24 km

Châteaufort Washhouse

Highlight • Structure

9.27 km

Forêt domaniale de Port Royal

Forest

12.5 km

Solid stone block supported by brickwork

Highlight • Other

13.3 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.

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13.5 km

Path between Magny-Village and the Port-Royal forest

Highlight • Other

This pretty path linking the small town of Magny-Village and the forest of Port Royal is very peaceful for running. With more or less dense vegetation, it offers an alternation of pleasant landscapes for the eyes.

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Tip by

14.0 km

Forest Path in Parc Naturel Régional de la Haute Vallée de Chevreuse

Highlight • Forest

14.1 km

Freeride Trail of la Croix du Bois

Highlight • MTB Park

From the Croix du Bois park, you just have to enter the forest to have fun. The paths and trails are technical, bumpy and sometimes steep. The perfect mix for a great mountain bike ride.

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Tip by

15.3 km

End point

Bus stop

Way Types & Surfaces

Way Types