Pic des Trois Seigneurs, Mountain peak at 2199 meters in Ariège, France

Pic des Trois Seigneurs is a summit of the French Pyrenees in Ariège, reaching 2,199 metres. It is the main peak of the massif of the same name, set at the meeting point of the Courbière, Vicdessos and Arac valleys in the Couserans. Its bare, greyish-brown rock, strewn with loose stones and sparse low vegetation, rises in a roughly triangular silhouette above rocky outcrops.

The mountain served as a trade route in the 1600s when charcoal from Couserans forests was transported to forges in the Rabat Valley via the Pourtanelle pass. This commercial connection linked forest communities with metalworking centers for centuries.

The peak's name comes from gatherings of three lords from neighboring valleys who would meet there to discuss their territorial boundaries. These meetings show how high places once served as neutral ground for settling disputes between landowners.

The ascent from Port de Lers follows a trail that branches off three switchbacks before the pass, traverses to the Pont de Ganioule and climbs past the Étang d'Arbu to the summit, about three hours for 900 metres of gain. A longer route goes through the Embans cirque via the Étang Bleu de Courbière and the Pic de Peyroutet, roughly 4 h 30 for 1,200 metres.

Ice harvesters once collected frozen blocks from a nearby glacier and carried them down to Toulouse over roughly two and a half days. The long journey meant much of the ice melted during transport, making the work surprisingly difficult.