Entre Grignon et Monthion
Jolie boucle en balcon pour relier les deux villages. Si l'on est en forme, on peut faire le tour jusqu'à l'observatoire pour prendre davantage de hauteur.
At 7.8 km, this is a comfortable half-day walk for most hikers. At an average walking pace, plan for roughly 1 hour and 44 minutes.
Almost circular, this trail brings you back very close to your starting point. A short transfer or brief walk connects the finish to the trailhead.
As a Local Walking Network (LWN) route, this trail has a strong community character. It serves both regular local walkers and visitors discovering the area for the first time.
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SRTM-Höhendaten über OpenTopoData (offener Datensatz).