The forest is criss-crossed with large dirt roads and loads of singletracks. None of the latter have trail signs but the internet is full of many loops from 10km to 70km (best look at Utagawavtt.com or gpsies.com).
From North-West of Paris, drive the A15, then A115 and exit at St-Leu la Forêt and head to Carrefour des Quatre Cèdres in the forest of Montmorency, above St-Leu.
Have you ridden this trail? Help improve this information