The Montagne des Français reserve protects deciduous dry forest characteristic of the north of Madagascar.
Preliminary botanical and zoological inventories have been done that show these forests are rich in both fauna and flora and include a remarkable number of local and regional endemic species.
The main threats to the Montagne des Français are linked to demand for wood-based products from the nearby city of Antsiranana.
The base of a trail leading to the summit can be reached approximately 12 km by the paved National road 59b from Diego Suarez to Ramena.
These fortifications and the whole area around Diego were the scene of fierce fighting during World War II between the Vichy French colonialists and British occupying forces.