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Routes
Mountain biking trails
France
Ile-de-France
Palaiseau
Orsay

Fauvettes Viaduct – Aigrefon wood loop from Orsay-Ville

Routes
Mountain biking trails
France
Ile-de-France
Palaiseau
Orsay

Fauvettes Viaduct – Aigrefon wood loop from Orsay-Ville

Hard

4.3

(8)

69

riders

Fauvettes Viaduct – Aigrefon wood loop from Orsay-Ville

03:04

36.5km

610m

Mountain biking

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: June 22, 2026

Tips

Includes a segment that may be dangerous

A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.

After 34.8 km for 17 m

Waypoints

A

Start point

Train Station

Get Directions

1

4.72 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

2

5.55 km

Fauvettes Viaduct

Highlight (Segment) • Bridge

Nice point of view

Translated by Google •

Tip by

3

9.31 km

Singletrack in the Vallon de la Frileuse

Highlight (Segment) • Trail

Nice piece of forest single track, barely technical except when fording at its end.

Translated by Google •

Tip by

13.5 km

Point de Vue

Viewpoint

5

23.1 km

Aigrefon wood

Highlight • Forest

Ease of access and diversity of slopes

Translated by Google •

Tip by

6

23.3 km

Sablière d'Aigrefoin

Highlight • Forest

A magnificent playground for thrill seekers. The paths through the sandpit give you the opportunity to test your legs on the mounds.

Translated by Google •

Tip by

7

23.4 km

No difficulty, to do at sunset for pretty lights.

Translated by Google •

Tip by

25.5 km

Forêt domaniale de Port Royal

Forest

9

29.3 km

Vallée de la Mérantaise

Highlight • Gorge

The Mérantaise Valley, near Villiers-le-Bâcle, is a veritable green haven in Île-de-France. The trail runs along the Mérantaise River, winding through dense forests, meadows and wetlands rich in biodiversity. It …

Translated by Google •

Tip by

10

34.0 km

Technical Forest Singletrack

Highlight • Trail

Small, ultra-technical descent, with steps and rocks.

Translated by Google •

Tip by

B

36.5 km

End point

Train Station

Loading

Way Types & Surfaces

Way Types

13.8 km

12.8 km

3.30 km

3.28 km

3.18 km

144 m

< 100 m

Surfaces

9.42 km

9.12 km

8.95 km

4.78 km

4.01 km

254 m

< 100 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

Sunday 5 July

35°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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