The start is on the edge of the D43: parking is available just before the bridge over the Ouysse when coming from Lacave, near the Chemin des Bertoux.
This walk follows the entire route of the GR®6, but the red and white markings are rather faint.
(S/E) Take the Chemin des Bertoux, which climbs gently towards the hamlet.
(1) Follow the GR®6 route to the right, which runs along a very narrow road situated between a large stone house on the left and a walnut grove on the right; it serves a few houses on either side.
(2) Keep to the right to follow a limestone path that winds up the Ouysse valley, which has carved acanyon into the limestone plateau with magnificent cliffs on either side.This path presents no difficulty; it is shaded for the most part and occasionally veers slightly away from the river.
(3) Of note at this point is a geological feature known as the Fontaine du Truffé, which acts as an overflow for the underground water system; it spills into the Ouysse, cutting across the path in the event of very heavy rain. Continue on to the fortified mill at Cougnaguet, enjoying the peace and shade, except for a few hundred metres towards the end. The mill is open to visitors: check the opening times.
(4) Turn back and follow the outward route in the opposite direction to return to the starting point (S/E.