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Routes
Mountain biking trails
France
Ile-de-France
Palaiseau
Gif-Sur-Yvette

Valley view – View of the Petite Vallée loop from Courcelle-sur-Yvette

Routes
Mountain biking trails
France
Ile-de-France
Palaiseau
Gif-Sur-Yvette

Valley view – View of the Petite Vallée loop from Courcelle-sur-Yvette

Moderate

4.4

(5)

42

riders

Valley view – View of the Petite Vallée loop from Courcelle-sur-Yvette

04:31

57.0km

780m

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: May 28, 2026

Tips

Cycling is not permitted along parts of this route

After 18.7 km for 69 m

After 32.0 km for 221 m

After 42.4 km for 92 m

Waypoints

A

Start point

Train Station

Get Directions

1

7.38 km

Montjay Tunnel

Highlight • Trail

Like the nearby Fauvettes viaduct, the Montjay tunnel once served as the old Paris-Chartres railway line. In the middle of the communal forest of Bures-sur-Yvette, it punctuates the straight and rolling line leading to the viaduct.

Translated by Google •

Tip by

7.89 km

Bassin du Baratage

Lake

3

11.8 km

Janvry to St-Jean-de-Beauregard Trail

Highlight (Segment) • Trail

Very pleasant single despite the steep gravel climb at the level of the castle of St-Jean-de-Beauregard. In dry weather there is a short muddy section a bit before you cross …

Translated by Google •

Tip by

4

14.3 km

Janvry Animal Park

Highlight • Structure

Hens, llamas, warthogs. What to walk in the shade with family.

Translated by Google •

Tip by

5

19.8 km

valley view

Highlight • Other

Beautiful sandy forest somewhat resembling that of Fontainebleau

Translated by Google •

Tip by

6

29.7 km

Côte de l'Escargot

Highlight (Segment) • Climb

The climb to the Col de l'Escargot or just "l'Escargot" is indeed a classic of the area, it climbs for around 0.5km with an average of 8 or 9%
This …

Translated by Google •

Tip by

32.0 km

Bassin Sec du Mort Rû

Lake

33.3 km

Bois du Gros Chêne

Forest

9

34.4 km

A real little Bike Park. It is managed by an association, a panel with the rules related to the place is present at the top of the slopes.

Translated by Google •

Tip by

34.8 km

Bois de Monsieur

Forest

11

37.8 km

View of the Petite Vallée

Highlight • Viewpoint

Nice view, near many small paths and single track.

Translated by Google •

Tip by

12

41.2 km

Decent very nice with banked turns that zigzag on the way down.
to do by mountain bike - guaranteed sensation: o)

Translated by Google •

Tip by

B

57.0 km

End point

Train Station

Loading

Way Types & Surfaces

Way Types

24.1 km

12.6 km

8.29 km

6.87 km

5.15 km

< 100 m

Surfaces

18.0 km

14.0 km

10.6 km

10.2 km

3.55 km

625 m

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Elevation

Elevation

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

Highest point (170 m)

Lowest point (60 m)

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Weather

Powered by Foreca

Saturday 4 July

30°C

14°C

-- %

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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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