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

The Big Drop – Down by the river loop from Gravigny Balizy

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

The Big Drop – Down by the river loop from Gravigny Balizy

Hard

4.5

(2)

8

riders

The Big Drop – Down by the river loop from Gravigny Balizy

02:58

43.9km

490m

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: August 27, 2026

Tips

Includes a segment that is highly dangerous

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

After 25.6 km for 50 m

Waypoints

A

Start point

Train Station

Get Directions

12.9 km

Étang

Lake

2

17.3 km

Technical Descent in Verrières-le-Buisson

Highlight • MTB Park

👍🏾

Tip by

3

18.2 km

The Big Drop

Highlight • MTB Park

On a nice single a U that lets itself be tempted ;)

Translated by Google •

Tip by

4

19.4 km

Viewpoint depending on the vegetation, but still a nice place for a break.

Translated by Google •

Tip by

20.2 km

Réserve biologique intégrale de Verrières

Nature Reserve

6

21.8 km

Nice single that goes down dry with big stones so a bit technical you have to get on the back and don't go up unless you want to push the bike :)

Translated by Google •

Tip by

24.7 km

La Batterie de Bièvres

Ruins

8

25.0 km

Carrefour du Grand Maître

Highlight • Trail

paved road doable by road bike

Translated by Google •

Tip by

9

25.7 km

Forest Trail Descent

Highlight • Trail

10

27.0 km

Verrières slide

Highlight (Segment) • Trail

Very steep slope with a lot of stones. Not for beginners.

Translated by Google •

Tip by

11

27.8 km

Down by the river

Highlight (Segment) • Other

A light path that allows you to drive as close as possible to the stream. Not very technical.

Translated by Google •

Tip by

B

43.9 km

End point

Train Station

Loading

Way Types & Surfaces

Way Types

19.3 km

12.0 km

4.73 km

3.97 km

3.40 km

420 m

114 m

Surfaces

26.9 km

8.75 km

3.00 km

2.35 km

2.13 km

812 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 (40 m)

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Weather

Powered by Foreca

Tuesday 20 October

14°C

7°C

87 %

Additional weather tips

Max wind speed: 27.0 km/h

to get more detailed weather forecasts along your route

Comments

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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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