Departure from the Foyer Rural car park (Route de Sainpuits).
(S) Head towards the village; in front of the EDF transformer, turn left. At the stop sign, turn left towards Perreuse (south-west). Pass the Fontaine des Gilets fountain, then 100 m further on, take the path on the left (farm shed on the right). When you reach the Croix Saint-Nicolas cross, turn left and follow the path to the tarmac road.
(1) At this crossroads, take the small road that goes down to the right. Walk 200 metres to discover the source of the Loing and the stele erected in 1994 tracing the course of the Loing.
(2) Continue along this road. At the next crossroads, turn right and continue to the hamlet of Les Guittons.
(3) At the edge of the village, take the small path on the left that leads to the source, which is actually the first resurgence of the Loing. From its source, the Loing flows underground and reappears here, then disappears underground again a few steps further on, only to reappear a little further on. Retrace your steps and, when you reach the road, turn left. Continue through Les Gressiens and Les Rameaux.
(4) At the end of this hamlet, take the path on the left for 200 metres. Go down the path on the right. It leads to the Montillon spring. One hundred metres after this fountain, take the road on the right. Watch out for traffic!
(5) When you reach the village of Sainte-Colombe, take the road on the left towards Les Landris. You will pass the Fontaine d'Aubert fountain (a good spot for a picnic). Walk through the hamlet of Les Landris until you reach the next path on the right.
(6) Take this path 150 m after the last houses. Continue, ignoring the path on the left, cross the Loing river, then head up towards the hamlet of Les Thomas. When you reach the road, turn right and then immediately take the dirt track on the left.
When you reach the small road, turn right until you reach the Desleaux fountain, then descend to the spring and the wash house.
(8) Return to the road and continue to the crossroads 100 m away, then take the path opposite. Continue to the next road.
(9) Going down this path, pass in front of the Boutin spring and wash house.
(10) A little further on, at the pond, a large underground river flows beneath your feet, feeding the Paris Basin's water table. Climb up to the road and turn right. On the way down, take an open path that leads to the Fontanelles spring. Go back up this path, turn right onto the road and continue to the junction with a perpendicular road -watch out for traffic.
(11) Turn left, then after 50 metres, take the dirt track on the right which will take you back to the starting point (S/E).
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