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Hiking trails & Routes

Saint-Martin-Du-Tertre

Montée de la Pierre Turquaise – Covered alley loop from Forêt de Carnelle

Hiking trails & Routes

Saint-Martin-Du-Tertre

Montée de la Pierre Turquaise – Covered alley loop from Forêt de Carnelle

Moderate

5.0

(2)

6

hikers

Montée de la Pierre Turquaise – Covered alley loop from Forêt de Carnelle

04:01

14.5km

260m

Hiking

Moderate hike. Good fitness required. Easily walkable paths. The starting point of the route is right next to a parking lot.

Last updated: November 7, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc naturel régional Oise-Pays de France

Waypoints

A

Start point

Parking

1

1.08 km

Carnelle Cobbles

Highlight • Other

Paris-Roubaix is fun next door! It beats hard in gravel ...

Translated by Google •

Tip by

2

10.2 km

Tour du Guet Chappe

Highlight • Monument

This visit on Sunday morning, Chappe museum

Translated by Google •

Tip by

3

10.2 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

Translated by Google •

Tip by

4

11.1 km

Franconville Castle

Highlight • Other

Located between Saint Martin du Tertre and the forest, the beautiful castle of Francoville served as a hospital. If the building is impressive, it is its superb park that will delight nature lovers. It is home to beeches, chestnut trees, oaks, Japanese chestnut trees...

Translated by Google •

Tip by

5

11.1 km

The Château-pital of Saint-Martin-du-Tertre

Highlight • Castle

A beautiful castle, located at the bottom of St Martin du Tertre, it has long served as a hospital. It seems that this is no longer the case. The hospital would be installed on the grounds of the domain a little more to its left.

Translated by Google •

Tip by

6

13.8 km

Montée de la Pierre Turquaise

Highlight • Other

A must in the Carnelle Forest, used by many cycle tourists with its 8% average. It stings your legs!

Translated by Google •

Tip by

7

14.3 km

Covered alley

Highlight • Historical Site

This funerary megalith dates back to the beginning of the Neolithic period! It is the largest and most famous of all the covered alleys in the Paris region, which has become the archetype of burials associated with the Seine-Oise-Marne culture.
All the slabs are in Fontainebleau sandstone, several outcrops of which are visible on the hillside.

Translated by Google •

Tip by

B

14.5 km

End point

Parking

Way Types & Surfaces

Way Types

10.2 km

2.41 km

1.05 km

818 m

Surfaces

8.05 km

4.70 km

1.06 km

675 m

< 100 m

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Elevation

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

Highest point (190 m)

Lowest point (60 m)

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Weather

Powered by Foreca

Sunday 8 November

9°C

4°C

45 %

Additional weather tips

There’s a fairly high chance of rain. Consider packing a waterproof jacket.

to get more detailed weather forecasts along your route

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