Devenson, Coastal inlet in the 9th arrondissement of Marseille, France

Devenson is a coastal inlet in the 9th arrondissement of Marseille with tall limestone cliffs dropping down to the Mediterranean Sea. The formation consists of vertical rock walls with different layers and structures typical of calanque geology along this coastline.

The name Devenson is Provençal. The park service links it to the cliff's full-south exposure, but it more likely refers to regulated communal pastures or woods, as with the marais des Defends in Carentan or the defends at Lamanon and Ayguières. It is not pronounced the English way.

Climbers come regularly to the limestone walls to work on different routes and difficulty levels, and the place has developed as a meeting point for this sport. The cliffs have become part of the local climbing culture and identity.

The inlet has no land approach other than the Corniche Paretti trail, one of the hardest paths in the massif because of its exposure and complex route. Boat is the other way in, and rappelling is used by climbers. The Devenson cliffs above rise past 200 m in places.

This inlet sits between Oeil de Verre and Eissadon calanques and remains relatively undeveloped due to its difficult access. The isolation helps keep the natural setting unchanged throughout the year.