Most of the massif is located in the commune of Marseille.
The north-east of the massif is divided between La Penne-sur-Huveaune and Aubagne.
Its highest peak is Mont Carpiagne (646 m).
Two peaks in the Chaîne de Saint-Cyr are located in the Pays d’Aubagne et de l’Étoile:
- La Candolle (404 m) above La Penne-sur-Huveaune,
- Le Télégraphe (321 m) above La Penne-sur-Huveaune and Aubagne.
The massif, made entirely of limestone, is criss-crossed by numerous small valleys that resemble a star-shaped network of waterways around the peaks, none of which has a river running through it, except after heavy rainfall.











