The Fusain, a tributary of the Loing, is located so well at the foot of Château-Landon that it splits into several branches to occupy the valley floor.
Valley bottom that this circuit allows to discover, level then in height.
With your back to the Tourist Office, go left then turn left into rue de la Ville Forte. Go down the stairs to the right by the South Poterne. It crosses the rue du Bas Larry, and runs down to the bridge over the charcoal. Cross it and turn right, path of the lovers, along the river. After the communal washhouse, turn left twice and walk along the other arm of the Fusain. Cross the bridge, continue on the other side. Cut the road, take the path opposite and continue along the river. Take the bridge on the left, follow for 1200m, rue des Martins on the right followed by rue de Pont Franc. Passed Pont Franc, turn right into the path, cross the 2 arms of the Fusain and, straight ahead, join the "Moulin de Bigonnneau". Go along the D43 on the left then turn into the road on the right. Go up the path on the left (GR 13) to arrive at the hamlet of Fusselette. Turn right, walk alongside the Touvent farm, cross the D 52 and follow the path that turns right. Turn right into the path then into the road and left into the grassy path (viewpoint on the ramparts).
At the Tabarderie, follow the road to the left, turn right twice to cross 2 arms of the Fusain. Continue crossing the park towards the city, to the right of the 3rd arm of the Fusain. Cross the Caesar bridge and follow the Fusain to the right. Climb the stairs, cross the rue du Bas Larry to enter the lane of the Hospice Turn right rue Jean Galland and arrive at the Place du Marché and the Tourist Office.
This route is marked in green by the Codérando.