Puig Sec, Mountain peak in Valmanya, France

Puig Sec is a mountain peak at 2,665 meters (8,743 feet) standing between the communes of Valmanya and Casteil in the eastern Pyrenees. The summit sits on the natural boundary that separates these two administrative territories.

Puig Sec is a subsidiary summit of the Canigou massif, separated from the Canigou peak (2,784 m) and the Barbet ridge (2,748 m) by a col known as the porteille de Valmanya. Its summit lies on the boundary between the communes of Valmanya and Casteil, in the Pyrénées-Orientales; Catalan sources place the same line between Vallmanya and Castell de Vernet, both in Conflent.

The name is Catalan for "dry peak", describing the bare rock of the upper slopes. The summit marks the limit between Vallmanya and Castell de Vernet, both in the Conflent comarca of Northern Catalonia, so the mountain lies within the Catalan-speaking area on the French side of the Pyrenees.

The summit lies on the border of Valmanya and Casteil, separated from the Canigou peak and the Barbet ridge by the porteille de Valmanya, the col to the north. Approach routes therefore come from the Conflent valleys below, and the upper slopes shown in photographs are bare rock and snow patches, so plan for exposed ground near the top.

From the summit, visitors can see the highest point of the Canigou massif at 2,784 meters (9,134 feet), allowing geological comparison between the two peaks. This view reveals surprising details about the rock formations that shape the eastern Pyrenees.