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Bike touring routes & trails

Sermaise Washhouse – Dourdan Lighthouse loop from Bonnelles

Routes

Bike touring routes & trails

Sermaise Washhouse – Dourdan Lighthouse loop from Bonnelles

Moderate

riders

Sermaise Washhouse – Dourdan Lighthouse loop from Bonnelles

04:10

69.5km

400m

Cycling

Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: October 31, 2025

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Tips

Your route passes through protected areas

Please check local regulations for:

Parc naturel régional de la Haute Vallée de Chevreuse

Natura 2000 du Massif de Rambouillet et Zones Humides Proches

Waypoints

Start point

Bus stop

Get Directions

8.33 km

Château du Marais' lakeside Plane trees

Highlight • Forest

17.0 km

Sermaise Washhouse

Highlight • Monument

22.4 km

Dourdan Lighthouse

Highlight • Monument

A maritime beacon in the middle of the crossroads.

Translated by Google •

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53.9 km

Les glacières de Sonchamp

Highlight • Other

Along the enclosure wall of the Château de Pinceloup, two coolers. One in masonry, the other, probably more recent, is built in tiles on a metal frame. Surprising to come across these remains.

Translated by Google •

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58.9 km

A quiet, bucolic spot

Highlight • Other

very beautiful place

Translated by Google •

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59.2 km

Lake Clairefontaine-en-Yvelines

Highlight • Lake

Pond in the middle of a landscaped park, with benches, an ideal place for a break.

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67.3 km

Saint Vincent and Saint Sebastian Church

Highlight • Other

67.9 km

Singletrack Parallel to Rue des Aulnettes

Highlight (Segment) • Trail

More pleasant than the road, indeed.

Translated by Google •

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69.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

51.9 km

9.12 km

5.04 km

1.19 km

1.11 km

1.08 km

< 100 m

Surfaces

55.9 km

11.2 km

2.32 km

< 100 m

Elevation

Highest point (170 m)

Lowest point (70 m)

Weather

Today

Tuesday 25 November

7°C

3°C

10 %

If you start your activity now...

Max wind speed: 18.0 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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Sermaise Washhouse – Dourdan Lighthouse loop from Bonnelles

Château du Marais' lakeside Plane trees

Sermaise Washhouse

Dourdan Lighthouse

Les glacières de Sonchamp

A quiet, bucolic spot

Lake Clairefontaine-en-Yvelines

Saint Vincent and Saint Sebastian Church

Singletrack Parallel to Rue des Aulnettes

Nearby routes

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