Park in the free car park on the D33, 1.4 km from the château in the direction of Crouy-sur-Cosson. This car park is not signposted from the road and is accessed via a lane.
(S/E) Follow the Cosson river towards the château on its left bank (do not change banks from the car park). Walk along the south-east side of the château, then go around it and walk away from the opposite façade, following the Rond Prince Louis.
(1) With your back to the castle, take one of the two straight lanes. At the roundabout, take the white and redGR® signposted path on the right. Cross the François 1er road (take care) and take the lane opposite.
(2) Leave the lane, go through the gate and continue along the "Sentier des Parquets Assegonds". This path joins a lane which you should take on the right. This continues along a narrow path: ignore the path on the left and continue in the same direction (north-east). Cross two crossroads, the "Route de la Reine" lane, then another crossroad.
(3) At the intersection with the next cross path, turn left. When you reach the "Route Princesse Élisabeth" lane, turn right and then left onto the first path you come to. This narrow path winds through the forest until it crosses a cross path.
(4) At the next intersection, continue on the path that branches off at a right angle to the left. This path crosses the crossroad, curves, crosses a second crossroad, then the "Route de la Reine" lane and a final crossroad.
(5) At the intersection with the "Route Princesse Élisabeth" lane, take the right-hand path. This path joins the lane you took on the way there, which you should follow to the right until you reach the D112a. Go through the gate, then turn left onto the road with the castle in front of you. Go through the roundabout and take one of the two straight lanes facing the castle. Join the Cosson via the Rond Prince Louis.
(1) Take the lane on the left to follow the winding Cosson river, then cross the Pont Saint-Michel bridge to return to the starting point (S/E).