Hard mountain bike ride. Very 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: November 27, 2025

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Your route passes through protected areas

Please check local regulations for:

Parc naturel régional de la Haute Vallée de Chevreuse

Waypoints

Start point

Train Station

Get Directions

13.6 km

Route aux Cerfs

Highlight • Forest

nice on the way down but good climbing...

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15.0 km

Carrefour du Poteau de la Poterie

Highlight • Trail

a crossroads with indications...

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21.2 km

Remarkable oak

Highlight • Other

Beautiful tree. Nice place to relax...

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33.3 km

Path along the Ru des Vaux

Highlight • Trail

The trail that runs along Ru des Vaux in Bois Domanial des Cinq-Cent Arpents is perfect for an engaging mountain bike ride through dense forest with natural obstacles and rolling …

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33.5 km

Small bridge

Highlight • Bridge

In the Pont Granval reserve, a small stone bridge crosses a quiet river and offers a picturesque passage. This technical path, with climbs and descents around the river, winds through …

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37.1 km

Réserve biologique dirigée de la Vallée des Vaux

Nature Reserve

37.9 km

Cernay Pond

Highlight • Lake

Breathtaking view of the pond
ideal for a picnic

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46.5 km

Bois de la Brelinquinerie

Forest

49.1 km

Hairpin Turns in Parc naturel régional de la Haute Vallée de Chevreuse

Highlight • Trail

There are 4 or 5 that follow each other. They allow you to work on the noseturns going down and the cardio goes crazy going uphill.

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57.2 km

Réserve naturelle des Étangs de Bonnelles

Nature Reserve

67.9 km

Buttes Blanches Sand Quarry

Highlight • Natural

When I discovered this place, I couldn't believe it.

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69.3 km

End point

Train Station

Way Types & Surfaces

Way Types

30.2 km

21.9 km

7.98 km

3.92 km

2.68 km

2.26 km

302 m

Surfaces

31.3 km

13.1 km

10.3 km

3.53 km

838 m

Elevation

Highest point (180 m)

Lowest point (80 m)

Weather

Friday 12 December

10°C

6°C

0 %

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Max wind speed: 5.0 km/h

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

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Path along the Ru des Vaux – Small bridge loop from Dourdan - La Forêt

Route aux Cerfs

Carrefour du Poteau de la Poterie

Remarkable oak

Path along the Ru des Vaux

Small bridge

Cernay Pond

Hairpin Turns in Parc naturel régional de la Haute Vallée de Chevreuse

Buttes Blanches Sand Quarry

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