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Routes
Hiking trails & Routes
France
Ile-de-France
Mantes-La-Jolie
Lommoye

Calcareous grasslands – Rosny Forest loop from Lommoye

Routes
Hiking trails & Routes
France
Ile-de-France
Mantes-La-Jolie
Lommoye

Calcareous grasslands – Rosny Forest loop from Lommoye

Hard

5.0

(2)

8

hikers

Calcareous grasslands – Rosny Forest loop from Lommoye

05:16

19.3km

300m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: February 4, 2026

Waypoints

A

Start point

Bus stop

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1

3.20 km

Calcareous grasslands

Highlight • Other

2

3.68 km

Superb View

Highlight • Viewpoint

3

4.37 km

Forest Path

Highlight • Forest

4

4.83 km

Rosny Forest

Highlight • Other

The regional forest of Rosny is the green lung of the north-west of Île-de-France, with 1,751 hectares of wooded areas classified as a Natura 2000 site. It is located on a plateau which offers beautiful viewpoints when the landscape emerges.

Translated by Google •

Tip by

B

19.3 km

End point

Bus stop

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Way Types & Surfaces

Way Types

15.4 km

1.97 km

1.71 km

209 m

Surfaces

15.6 km

2.04 km

1.60 km

< 100 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 (150 m)

Lowest point (50 m)

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Weather

Powered by Foreca

Saturday 4 April

14°C

4°C

35 %

Additional weather tips

Max wind speed: 21.0 km/h

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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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