At Gavarnie, take the road to the Port de Boucharo and park at the car park at the Col des Tentes.
(S/E) Continue along the road, now closed to traffic, and reach the border pass known as Boucharo in French and Bajuruelo in Spanish.
(1) Turn left onto the wide path which, further on, crosses several streams: first the Gave des Tourettes, then the Ruisseau des Gabietous (take care as the rocks may be a little slippery). Then cross the stream flowing from the Glacier du Taillon, continue along the path and climb the small Col des Sarradets.
(2) Continue on to reach the refuge of the same name.
(3) Then take the moraine heading due south, cross the small snowfield and complete the ascent of the Brèche de Roland through the rocks.
(4) Descend via the same route to return to the Col des Tentes car park (S/E).

A very beautiful hike, it's so beautiful that it takes your breath away!