In autumn, the forest resounds with the raucous sounds of deer mating season. The males compete for the title of "dominant". In the distance, a mysterious cry can be heard... Come and listen to these exceptional moments in the heart of the Halatte forest. An Office National des Forêts guide will accompany you on this unusual nocturnal outing. Useful info: Meeting point : Poteau du Grand Maître, route le Grand Maître ( D120) Places are limited, so bookings must be made with the Pays d'Oise et d'Halatte Tourist Office. Bring suitable footwear and clothing.