Rather dangerous hill, especially downhill: It is relatively narrow and winding. Sometimes it narrows down a lane. The bends can surprise you with their length and you can end up on the wrong way (thus risking death). The road can be slippery as it is shaded in some places with residue, which reduces drying time. Towards the end, there is a stop which cannot be respected if we descend too quickly again.
Update: beware, a speed bump has been added without too much warning, rather towards the end.
The 30km / h speed indication is not too much.

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mohammed

August 30, 2025

Road cycling

jolie circuit

Mathieu Nuée

October 7, 2023

Road cycling

Fairly steep slope and bends, quite rare in the area

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1. Bois de Boulogne – Longchamp Circuit loop from Argentine

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Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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2. Mount Valérien – Route Royale, Marly Forest loop from Suresnes Mont-Valérien

61.1km

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Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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3. View of the Seine – Old Poissy Bridge loop from Suresnes Mont-Valérien

92.9km

04:30

980m

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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Hard

Details

Informations

Elevation 140 m

Weather

Wednesday 25 February

17°C

7°C

0 %

Additional weather tips

Max wind speed: 14.0 km/h

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Location: Louveciennes, Saint-Germain-En-Laye, Ile-de-France, France

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Côte du Prunay

1. Bois de Boulogne – Longchamp Circuit loop from Argentine

2. Mount Valérien – Route Royale, Marly Forest loop from Suresnes Mont-Valérien

3. View of the Seine – Old Poissy Bridge loop from Suresnes Mont-Valérien

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