Cascade de la Lauze is a waterfall upstream from the bigger Cascade de Nerech, located south of Les Bordes sur Lez in the French Pyrenees.
From Saint Girons drive west over road d618 until you reach Audressein, here you take the d4 to Les Bordes sur Lez and further on to Vallee du Riberot (Reserve de Domaniale du Mont Valier). There is a sign, turn left here. Drive on until you reach a big parking (gps 42.832318, 1.030830).
From the parking at Maison du Valier it is a 5 kilometer walk (80-90 minutes), with a total ascent of 600 meter, over trail GRT55, following the river Le Ribérot south. Just before a steep part of the trail you first see the beautiful cascade de Nerech. After a steep climb (along cascade de Nerech) you finally will reach a viewpoint on Cascade de la Lauze.