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Mountain biking trails

GR along the Dampont woods – Chaussée Jules César loop from Pontoise

Mountain biking trails

GR along the Dampont woods – Chaussée Jules César loop from Pontoise

Moderate

4.3

(4)

18

riders

GR along the Dampont woods – Chaussée Jules César loop from Pontoise

03:37

47.2km

500m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is accessible with public transport.

Last updated: August 14, 2026

Tips

Cycling is not permitted along parts of this route

After 5.26 km for 94 m

After 40.2 km for 155 m

Waypoints

A

Start point

Train Station

1

3.48 km

Greenway along the residences of Osny

Highlight • Trail

Super fun, and practical to avoid the main boulevards

Translated by Google •

Tip by

2

5.48 km

Château de Grouchy and its ponds

Highlight • Castle

Ideal for family picnics and artistic walks. The park is magnificent!

Translated by Google •

Tip by

5.76 km

Château de Grouchy

Castle

4

6.10 km

2

Highlight • Other

5

18.6 km

GR along the Dampont woods

Highlight • Other

Good trail along the domain. too bad we can't see the castle 😌

Translated by Google •

Tip by

6

25.0 km

Short but fun... Slalom and piloting

Highlight • Other

7

27.0 km

Moulin de Vallière

Highlight • Monument

essential place of the Vexin where you can see different species of birds.

Translated by Google •

Tip by

8

32.4 km

Chaussée Jules César

Highlight • Other

Chaussée Jules César, Hilly viewpoint over the Vexin and its various castles.

Translated by Google •

Tip by

9

36.3 km

Beginning of chaussée Jules César

Highlight • Other

The Jules-César roadway in Vexin bears witness to Roman influence in the region. It is part of a network of military roads dating back more than 2,000 years. This historic …

Translated by Google •

Tip by

38.1 km

Viewpoint

Viewpoint

B

47.2 km

End point

Train Station

Way Types & Surfaces

Way Types

24.1 km

8.24 km

7.17 km

3.77 km

3.74 km

227 m

< 100 m

Surfaces

21.1 km

14.7 km

4.93 km

3.70 km

1.81 km

963 m

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Elevation

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

Highest point (120 m)

Lowest point (20 m)

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Weather

Powered by Foreca

Tuesday 13 October

20°C

7°C

0 %

Additional weather tips

Max wind speed: 7.0 km/h

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