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Le Petit Étang de Carnelle – The Blue Lake of Carnelle loop from La Borne Blanche

Routes

Mountain biking trails

Le Petit Étang de Carnelle – The Blue Lake of Carnelle loop from La Borne Blanche

Moderate

5.0

(2)

riders

Le Petit Étang de Carnelle – The Blue Lake of Carnelle loop from La Borne Blanche

03:42

42.5km

560m

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: July 18, 2026

Tips

Includes a very steep uphill segment

You may need to push your bike.

After 18.7 km for 145 m

Waypoints

Start point

Train Station

Get Directions

5.99 km

Singletrack Descent 2 – Parc naturel régional Oise-Pays de France

Highlight (Segment) • MTB Park

there are good springboards including 1 with a 6m pit between the springboard and the landing

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10.6 km

Luzarches Market Hall

Highlight • Other

The Halle de Luzarches appears for the first time in texts around 1386. It has hosted many fairs and markets. If you want to experience this site on a busy day, just come on Fridays.

If the hall has been restored many times since the Middle Ages, it is classified as a historic monument. There are seven wooden pillars on the sides and three more on the ends. The roof is made of small country tiles which gives it a picturesque charm.

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13.0 km

Tunnel to cross the D922

Highlight • Other

This underground passage allows you to cross the D922 and avoid the two nearby interchanges.

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19.1 km

Saint-Martin-du-Tertre watchtower

Highlight • Monument

At 218 m altitude, the highest point of Val-d'Oise, you can discover an exceptional landscape on the plain of France, the hills of Châtenay-en-France, Écouen, Maffliers and Paris with the Montparnasse tower, the Eiffel tower …

This tower is also the city's tourist office and houses its Chappe museum.
To find out more: otsi-saintmartin95.com

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21.4 km

Le Petit Étang de Carnelle

Highlight • Lake

The Petit Étang de Carnelle is located in the heart of the forest of old marl quarries. With an area of 1.3 hectares and a depth of 20 meters, this pond is artificial. It is a peaceful place, ideal for running a loop and watching the fishermen settle in peace. Certain points of view allow you to better appreciate the density of the forest.

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21.8 km

The Blue Lake of Carnelle

Highlight • Forest

Lac Bleu is one of the two bodies of water in the Carnelle forest. On sunny days, its name takes on its full meaning. But there is another reason for the name of this lake from ancient quarries. The rock at the bottom is a mixture of gypsum and marl. The color is changing due to algae, but originally it is deep blue. Around the lake, one can appreciate oaks, beeches and chestnuts. A feast for the eye!

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22.2 km

The Sylphes Pond

Highlight • Lake

Much less known than the other 2 ponds of Carnelle and much smaller too, this pond remains very pretty with its island of water lilies.

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34.0 km

Bois de Bonnet

Forest

40.0 km

Downhill in the woods

Highlight (Segment) • Trail

Descent pleasant to do and not very technical

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42.5 km

End point

Train Station

Way Types & Surfaces

Way Types

20.8 km

13.6 km

3.99 km

3.82 km

262 m

107 m

Surfaces

26.1 km

7.57 km

6.47 km

1.87 km

412 m

< 100 m

Elevation

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

Highest point (200 m)

Lowest point (30 m)

Weather

Tuesday 28 July

38°C

18°C

0 %

Additional weather tips

Max wind speed: 21.0 km/h

to get more detailed weather forecasts along your route

Comments

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Le Petit Étang de Carnelle – The Blue Lake of Carnelle loop from La Borne Blanche

Singletrack Descent 2 – Parc naturel régional Oise-Pays de France

Luzarches Market Hall

Tunnel to cross the D922

Saint-Martin-du-Tertre watchtower

Le Petit Étang de Carnelle

The Blue Lake of Carnelle

The Sylphes Pond

Downhill in the woods

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