Good physical fitness and a GPS (or the Visorando app) are recommended.
In the Ossau Valley, pass through the village of Laruns, then the hamlets of Eaux-Chaudes and Gabas, on the D934. Continue to Lake Fabrèges and carry on towards Pourtalet. Shortly before the pass, park in a staggered parking area alongside and to the left of the D934, at a place known as La Cabane de l’Araille (also called: Parking d’Anéou).
(S/E) The walk starts directly from the centre of the car park, on the opposite verge of the D934, on a track that is usually completely covered in snow from November to March.
Head towards the imposing U-shaped building complex (pastoral centre) towards which the track leads. Leave the pastoral centre on your left when you reach a fork in the track.
(1) Turn sharply right at the fork in the track towards the north-west. Cross a footbridge over the Lalagüe stream and pass the end of the path leading to the Cabane de Houns de Gabès on your right. Continue north-west, climbing up through the snow-covered mountain pastures of the Cirque d’Anéou, following the blue winter trail marked on the IGN map. The Pic de Peyreget is the imposing rocky massif directly ahead. The Pic du Midi d’Ossau is no longer visible. At 2,050 m, it is better to go round the hillock at the 2,116-metre mark on the left rather than on the right, as the slope is less steep. This will take you to the Col de l’Iou (2,194 m).
There are usually tracks left by skiers or snowshoers up to this point (at least), provided it hasn’t snowed overnight. The Pic du Midi d’Ossau is revealed here almost entirely along its south-western face. From here, you enter an area of pristine and completely isolated landscapes.
(2) Go round the Pic Peyreget to the west and north-west, keeping it on your right. Do not descend to the level of Lac de Peyreget as the summer path does, but instead head north-north-east towards a rocky ridge to reach it.
(3) Go round this ridge to the left before heading due east, ascending the gully between the Peyreget and the Pic du Midi d’Ossau. You’ll cross a scree slope, where it is common to find snow bridges over peat bogs (beware of rockfalls near the boulders). Pass the two small snow-covered lakes, preferably in the middle or keeping them close to your right, and the third small lake at 2,159 m, keeping well to the right of it. You then pass at the foot of an imposing rock mass on the left, rising to 2,316 m, with rocks completely shaped by erosion. Via a fairly long, chaotic steep slope, you reach the Col de Peyreget, at an altitude of 2,380 m.
(4) Suddenly, the ridges come into view in the distance. The view is remarkable… but there’s more to come!
The imposing mass of the Pic du Midi d’Ossau is very close by… View of the snow-covered lake and the Pombie Refuge, 350 m below. Head due south along the serrat leading to the summit, which slopes quite gently.
(5) Reach the summit of Pic Peyreget (2,487 m). The landscape is no longer just remarkable, it is exceptional: a 360° view, with the Pic du Midi d’Ossau to the north, the Ayous Lakes and the peaks towering above them to the north-west, the border range to the south, with the Spanish summits, the Balaïtous to the east and – all around – the vast expanse of the snow-covered Pyrenees….. On the descent, head for a secondary summit, very close by to the east,
(6) This offers an unobstructed view of the Pombie Refuge. Follow roughly the same route as on the way up to reach the Col de Peyreget.
(4) Head north along the ridge of the pass as far as possible.
(7) Look down (just glance) towards the descending couloir which branches off to the right towards the Grande Raillère de Pombie and leads to the Couloir de la Fourche du Pic du Midi d’Ossau. Retrace your steps back to the pass.
(4) Head due east down the gently sloping descent. If there are no tracks, keep the Refuge de Pombie in your sights and, navigating the bumps and dips, avoid the lakes and rocky outcrops. The route described here therefore presents no danger. Reach the Refuge de Pombie.
(8) Head due south towards the Col du Soum de Pombie, signposted by a sign. You will need to climb 75 metres in altitude to cross the pass. Reach the Col du Soum de Pombie, which is very poorly marked.
(9) Descend the southern slope of the pass, across the snow-covered slopes, following the summer path if the snow is not too deep. Following a series of hairpin bends, pass close to the Cabane de Sénescau, then return to the Ruisseau Lalagüe near the Cabane de Houns de Gabès; cross the stream and follow the track you took on the way there to reach the car park (S/E).