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Start from the small car park along the D8, next to the recycling bins, below the church at the foot of a small cliff.
Yellow markings along the entire route, with a few information panels about the sites.
(S/E) Stay on the bank of the Lot and go down the path to the left (looking at the river) and to the foot of the sign indicating the resurgences. Continue along the path that passes over the resurgences and, after about 50 metres, ignore the path going up to the left towards the village. Follow the bank of the Lot to a fork.
(1) Turn left, walk past a beautiful stone house and climb up to the D26. Cross the road carefully and follow it to the right for about 50 metres. Then take the path that climbs to the left of the road, just after passing a house. Follow the path, go around a hairpin bend to the left and you will come to a fork in the ridge marked by signs indicating "viewpoint" and "end of the path leading up from the valley" (at the start of the path, signs indicate that the path leading up from the cemetery is strongly discouraged in wet and muddy weather).
(2) Head north towards the viewpoint.
(3) Continue north-northwest until you reach the remains of the phosphate mine.
(4) Continue north-northwest along the summit and reach the viewpoint overlooking the Lot valley and the village of Crégols.
(5) Retrace your steps.
(4) Continue south-southeast.
(3) Take a path on the left and you will soon come to an abandoned well with information about it. Continue between the three stone huts and a pretty cazelle (stone hut for keeping sheep), which you need to walk around to see the door. After the last hut on the right, continue along the grassy path to return to the route you took on the way up and follow it to the left for about 100 metres.
(2) At the fork in the path, take the left fork, which is wide and easy to follow (follow the yellow markings and the Visorando route). The main track winds along the ridge. Ignore the various small paths and turn 90° to the left, ignoring the grassy path opposite. Descend slightly on a path between two stone walls and you will come to a track suitable for vehicles.
(6) Turn right and continue straight ahead until you reach a cross track, facing a low wall.
(7) Turn left and then left again almost immediately, then continue straight ahead on this track for about 800 metres until you find the start of a path on the left, discreetly marked by a small sign.
(8) Follow it for about 100 metres, then turn right at a 90° angle and you will arrive at the ruins of a farm with an explanatory sign. Then return to the path and turn right. Follow a slightly steep descent to reach the chasm.
(9) Caution! The natural site is unprotected, so please be careful. View of the chasm = "karstic cave". Walk around it (you can continue along the path, which passes to the right of the chasm) then take a fairly steep descent, which can be slippery in wet weather, to reach a track suitable for vehicles. Turn right and you will reach the tarmac road.
(10) Continue downhill and return to the village of Crégols, passing close to the cemetery (to the right of the cemetery, note the sign for the direct climb to the phosphate mine and the viewpoint, which we did not take on this day as it is steep with a few steps and very wet ground). In the village, enjoy the view of the castle on the left and the church on the right, then head to the small car park along the D8 (S/E).
Visorando member
Difficult 
Tourism professional
Easy 
