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Parking for the karst trail on the D111E, 1 kilometre after Merey-sous-Montrond towards the Fontain Forest. Good quality yellow-blue markings on the karst trail, then no markings.
(S/E) With your back to the road, turn right, walk past the buildings, and follow this wide, well-marked trail dotted with wooden information signs. You will pass a first sinkhole. At the second, much deeper sinkhole, you can climb down a staircase.
(1) Coming up from the Grande Doline, continue to the left. You will cross dissolution sinkholes planted with fresh fir trees, slaloming between the sharp limestone pavement. You will pass under the green Porche carved into the stone and reach the footbridge that spans the Puits Noir, a 30-metre chasm. In the past, farmers used to throw their animal carcasses here.
(2) You will then pass in front of the Saint Grosjean well, formed by the collapse of a large underground chamber, and the path will take you back peacefully to the car park.
Walk down the road to the right for about 100 metres and head back into the woods via the forest path on the left.
(3) This beautiful, unmarked forest path will allow you to continue this short walk in a more rustic and less developed landscape of sinkholes and sharp limestone pavements. After 300 metres, it turns right and a little further on, you will come to a fork. Take the well-marked path on the left for 100 metres, going around a large sinkhole.
(4) When the path crosses a cart track, leave it and descend to the right into the sinkhole via the same cart track. This straight track will lead you to the departmental road and take you through the hollows of several sinkholes. At the end, you will come to the sharp limestone pavement at the edge of a sinkhole. Turn left onto the path that goes around it.
At the departmental road, go up to the right, passing in front of the statue of Saint Sebastian. Ten steps further on, head back into the woods via the path on the left to quickly find the marked trail that will lead you to the right towards the car park (S/E).
Rocky and slippery paths in places. Sturdy footwear is essential and walking sticks are recommended. The path and stairs can be slippery.
Visorando member
Moderate 
