Covering almost 900 hectares in the ubac between 1150m and 2316m, it is criss-crossed by the Infernet, Bragousse and Colombier torrents, which form the Boscodon alluvial cone with its devastating floods.The forest was managed by monks for 650 years: trees were towed to the Durance where they were assembled into rafts to float down to the Rhône. Over-exploited after the monks stopped managing, it has been painstakingly restored: its high quality and biodiversity have earned it Natura 2000 status and the "exceptional forest" label.