Pic du Lac de la Chourique, Penas de Ibon and Lac d'Ansabe Loop

This difficult loop in the western Pyrenees links the pastoral Ansabère valley with a high, rocky crossing above the Spanish side, creating a route of roughly 15 km / 9.3 mi with about 1,100 m / 3,610 ft of ascent. It is a serious mountain day rather than a simple lake walk: expect long climbs, steep ground, loose stone, and a committing feel once you leave the lower valley. The route is best suited to experienced hikers who are comfortable on rough, uneven terrain and who can manage route-finding in broken limestone country.

The hike is generally associated with the Pont Lamary / Pont de Lamareich area near Lescun, Pyrénées-Atlantiques, France, in the Cirque de Lescun close to the French–Spanish border. Many route descriptions begin from the Pont Lamary parking area near the Borde de Lamareich / Lamary Bridge, which is the most useful landmark for planning the start. Sources describing nearby approaches place the start between Pont de Masousa and Pont Lamary, with the classic access heading up the Vallon d’Ansabère toward the cabins and lake. (fr.wikipedia.org)

By car, the usual approach is via Lescun in the Aspe Valley, then onward on the mountain road toward Pont de Masousa and Pont Lamary. Parking is typically at or near Lamary Bridge, though road condition and exact parking availability can vary, and some descriptions note a rough access track in places. If using public transport, the nearest practical access point is usually Pont de Lescun, which is served by regional buses from Oloron-Sainte-Marie; from there, hikers generally need a taxi, lift, or a substantial additional road walk to reach the Lamary/Masousa trailhead. Current journey planners show a regional bus connection between Oloron-Sainte-Marie and Pont de Lescun taking about 40–46 minutes. (rome2rio.com)

The opening section is comparatively gentle by the standards of the day. From the Lamary area, the route climbs on track and path through meadows, woodland edges, and open pastoral ground into the Vallon d’Ansabère. The first few kilometres are a steady warm-up rather than an immediate grind, and the landscape quickly opens into one of the most striking limestone cirques in the Béarn Pyrenees. The Cabanes d’Ansabère, at roughly 1,565–1,575 m / 5,135–5,167 ft, are an important landmark and a natural place to pause, check timing, and assess weather before committing higher. These cabins are part of an active summer pastoral zone, with sheep grazing in season and shepherd activity commonly continuing from June into late September. (mongr.fr)

Climb to Lac d’Ansabère and the high crossing

Beyond the cabins, the route becomes more mountainous. A junction near about 1,640 m / 5,380 ft leads toward Lac d’Ansabère, a small but beautifully positioned tarn set beneath the famous Aiguilles d’Ansabère. Although modest in size, the lake is one of the visual highlights of the circuit, especially because the sharp limestone towers and surrounding walls dominate the skyline. This is where the hike shifts from pastoral valley walking to a more mineral, alpine character. (mc2rando.fr)

From the lake, the ascent steepens significantly toward the crest and the Chourique sector. Expect scree, broken rock, and sections where footing can feel unstable. Some route descriptions mention a short chimney-like step or steep rocky passage near the crossing, while others note loose, rolling stones on the descent side. That combination means this loop is not just physically demanding; it also requires care with balance and line choice, especially if the ground is wet or if there is lingering snow. Early in the season, snow patches around the col or on shaded slopes can materially increase the seriousness of the route. (fr.wikiloc.com)

The high point area around Pic du Lac de la Chourique and the Peñas de Ibón gives broad views across the border country, including the basin of Ibón de Acherito on the Spanish side. Some variants touch or overlook the lake rather than descending fully to it, but the defining character