The Blue Lake of Carnelle – Le Petit Étang de Carnelle loop from Lamorlaye

Mountain biking trails

The Blue Lake of Carnelle – Le Petit Étang de Carnelle loop from Lamorlaye

Moderate

4.3

(4)

riders

The Blue Lake of Carnelle – Le Petit Étang de Carnelle loop from Lamorlaye

02:21

30.3km

340m

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 20, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc naturel régional Oise-Pays de France

Waypoints

Start point

Bus stop

Get Directions

3.91 km

The springs of Royaumont Abbey

Highlight • Other

mountain bike or VTC.

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15.6 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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15.9 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 …

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16.3 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 …

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18.6 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 …

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22.7 km

Concrete path

Highlight (Segment) • Other

Concrete path bordered by nature, nice!

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28.1 km

Logs on the path

Highlight • Other

Luckily I had my chainsaw with me

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30.3 km

End point

Bus stop

Way Types & Surfaces

Way Types

9.90 km

9.27 km

4.52 km

3.87 km

2.71 km

< 100 m

Surfaces

12.9 km

9.27 km

5.10 km

2.83 km

166 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 (20 m)

Weather

Monday 19 October

15°C

10°C

89 %

Additional weather tips

Max wind speed: 20.0 km/h

to get more detailed weather forecasts along your route

Comments

November 11, 2022,Un petit tour en forêt de Carnelle

Short outing in the Carnelle forest to enjoy nature and the sun. Apart from the climb of two or three small steep slopes, the circuit is rolling. The paths are still surprisingly dry for this time of year. Let's take advantage of having muddy trails!

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December 19, 2021,Une forêt de Carnelle au parfum mystérieux

Outing in a somewhat mysterious Carnelle forest, bathed in fog. Then a face-to-face encounter with a wild boar!
It is almost winter, the forest has become muddy in some places, it slides well and we get stuck in the mud. Some climbs do not pass by bike, it's too slippery! The descents are a bit tricky with the ruts, you …

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July 26, 2025,Forêt de Carnelle et château de Nointel

A weekend outing with @JPK in the Carnelle Forest under a generous sun and a slightly oppressive temperature. We crossed this forest, as we often do, passing by the three ponds and lake located at the summit (Petit étang, Lac bleu, and L'étang des Sylphes).
Reading an information panel on the shores of Lac bleu, we discovered the family of …

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