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France
Ile-de-France
Sarcelles
Viarmes

Carnelle Forest Loop

Moderate

4.5

(24)

85

hikers

Carnelle Forest Loop

04:05

14.5km

300m

Hiking

Hike the moderate 9.0-mile Tour of the Forêt de Carnelle, exploring diverse forests, prairies, and the unique Lac Bleu near Paris.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc naturel régional Oise-Pays de France

Waypoints

A

Start point

Parking

Get Directions

1

3.56 km

Alpaca farming

Highlight • Other

The farm is no longer open to the public and I haven't seen any alpacas behind the fences.

Translated by Google •

Tip by

2

4.46 km

Very rustic church in the village of Noisy-sur-Oise

Translated by Google •

Tip by

3

7.41 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 old quarries. The bottom rock 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 the oaks, the beeches and the chestnut trees. A feast for the eyes!

Translated by Google •

Tip by

B

14.5 km

End point

Parking

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Way Types & Surfaces

Way Types

6.38 km

3.77 km

2.60 km

1.24 km

497 m

Surfaces

7.04 km

4.06 km

1.67 km

1.16 km

543 m

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Elevation

Elevation

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

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Weather

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Monday 11 May

15°C

3°C

12 %

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Max wind speed: 15.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the difficulty level and typical duration for the Tour of the Forêt de Carnelle?

This hike is generally considered to be of moderate difficulty. While many sections are accessible, there are some climbs, such as the ascent to the Carrefour de Carnelle, which can be challenging. The tour covers approximately 14.5 kilometers and typically takes around 4 hours and 5 minutes to complete.

What kind of terrain can I expect on this route?

The terrain is quite varied, offering a diverse experience. You'll encounter a mix of dense forests, open prairies, and even pass through towns and villages. The forest is situated on a butte, leading to varied landscapes with some steep slopes. Expect paths through oak, beech, and chestnut trees, and potentially some wetlands. Some parts might require careful navigation, especially during wet conditions.

What are the main points of interest along the Tour of the Forêt de Carnelle?

The route offers several interesting sights. You'll pass by the historic Church of Saint Germain of Auxerre and the unique The Blue Lake of Carnelle, a former quarry now fed by springs. Keep an eye out for the Alpaca farming highlight, and the significant Neolithic dolmen, La Pierre Turquaise, which is one of the best-preserved prehistoric monuments in Île-de-France.

Is the Tour of the Forêt de Carnelle dog-friendly?

Yes, the Forêt de Carnelle is generally dog-friendly. Dogs are typically allowed on trails, but it's always best to keep them on a leash to protect wildlife and ensure a pleasant experience for all hikers. Please remember to clean up after your pet.

What is the best time of year to hike this trail?

The Forêt de Carnelle is beautiful year-round, but the best times to hike are typically spring and autumn. In spring, the forest comes alive with fresh greenery and wildflowers, while autumn offers stunning foliage colors. Summer can be pleasant, especially in the shaded forest sections, but be prepared for warmer temperatures. Winter hikes are also possible, offering a different, serene atmosphere.

Are there any permits or entrance fees required for hiking in the Forêt de Carnelle or the Parc naturel régional Oise - Pays de France?

No, there are generally no permits or entrance fees required to hike in the Forêt de Carnelle or within the Parc naturel régional Oise - Pays de France. The forest is publicly accessible, and its trails are free to use. However, always respect local regulations and leave no trace.

Where can I park to access the Tour of the Forêt de Carnelle trailhead?

While specific trailhead parking isn't detailed, the Forêt de Carnelle is well-maintained and offers numerous access points. Look for parking areas near the towns bordering the forest, such as Saint-Martin-du-Tertre or Viarmes, which often have designated spots for forest visitors. Public transport options are also available to reach the vicinity of the forest.

What kind of wildlife might I see in the Forêt de Carnelle?

The forest is home to a diverse array of wildlife. You might spot deer, wild boar, red deer (which have migrated from the Chantilly forest), foxes, badgers, and rabbits. The lakes, such as The Blue Lake, are populated by fish like roach and carp. Keep an eye out for various bird species as well.

Does the Tour of the Forêt de Carnelle connect with other trails?

Yes, this route intersects with and utilizes sections of several other trails within the forest. You'll find yourself on parts of official trails such as La forêt de Carnelle, Circuit de Belloy – Saint-Martin, L’eau des moines, and various 'Route Forestière' paths like Route de la Touffe and Route du Meurisier des Pierres.

Are there any facilities or amenities available along the trail or nearby?

The Forêt de Carnelle is well-maintained by the ONF (National Forests Office) and offers numerous picnic spots throughout. While there might not be specific facilities directly on the trail, the nearby towns and villages provide cafes, pubs, and accommodation options. It's advisable to carry sufficient water and snacks for your hike.

Is this hike suitable for families with children?

Yes, the Tour of the Forêt de Carnelle is generally considered suitable for families, given its moderate difficulty. While there are some climbs, many sections are accessible and enjoyable. The varied scenery and points of interest like The Blue Lake and La Pierre Turquaise can keep younger hikers engaged. Just be mindful of the overall distance and elevation gain for younger children.

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