Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is accessible with public transport.

Last updated: December 18, 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

Train Station

Get Directions

3.83 km

Bois domanial des Cinq-Cents Arpents

Forest

6.06 km

Single MTB du Ru des Vaux

Highlight (Segment) • Trail

But very pleasant in dry weather

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8.81 km

Réserve biologique dirigée de la Vallée des Vaux

Nature Reserve

9.58 km

Cernay Pond

Highlight • Lake

Breathtaking view of the pond
ideal for a picnic

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9.98 km

Petit Moulin des Vaux de Cernay

Highlight • Structure

Make sure to use the dirt path instead of the main road to properly see it

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10.1 km

Near the Vaux waterfalls in Cernay

Highlight • Trail

Wonderful landscape ! and in the middle flows a river 😁

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17.8 km

Breteuil Castle

Highlight • Castle

Beautiful view of the castle and its park. Several single tracks around the estate are perfect for exploring the surrounding woods.

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19.9 km

Forêt Départementale de Méridon

Forest

28.2 km

Viewpoint

32.6 km

View of Port-Royal Abbey

Highlight • Castle

Very good passage in the forest, enjoy!

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33.0 km

Descent from Port-Royal Abbey

Highlight (Segment) • Trail

One of the most beautiful descents in the park of the Chevreuse valley! the track is well traced... fortunately because the slope is steep and you quickly pick up speed when you know a little about this playful track

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34.5 km

Single from Port-Royal

Highlight • Other

Long single of 5km a little technical and while relaunching !!
Great !
Avoid in too wet weather there are a lot of roots that slip and the formation of …

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37.2 km

Mare de Rodon

Lake

46.6 km

End point

Train Station

Way Types & Surfaces

Way Types

20.9 km

14.4 km

4.35 km

3.28 km

2.73 km

451 m

390 m

Surfaces

19.0 km

9.07 km

9.01 km

6.16 km

2.12 km

658 m

510 m

Elevation

Highest point (180 m)

Lowest point (80 m)

Weather

Wednesday 24 December

2°C

-2°C

0 %

Additional weather tips

Max wind speed: 16.0 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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Petit Moulin des Vaux de Cernay

Near the Vaux waterfalls in Cernay

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View of Port-Royal Abbey

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