Aguja Guillaumet

Aguja Guillaumet is a granite spire in the Fitz Roy massif in Argentine Patagonia, located within Los Glaciares National Park. It forms the southern end of the massif's principal chain of sharp towers, standing approximately 2,579 meters above sea level.

The peak is named after the French aviator Henri Guillaumet, one of the pioneer pilots of the Aéropostale airmail service who flew dangerous routes across the Andes. Guillaumet was a close friend and colleague of the writer Antoine de Saint-Exupéry, who recounted his dramatic survival after a crash in the Andes.

The peak offers several established multi-pitch alpine climbing routes on quality granite, with the most popular being the Comesaña-Fonrouge route on the southeast face. Its relatively shorter height compared to nearby Cerro Fitz Roy makes it a popular objective for alpine climbers seeking technical Patagonian granite without a full big-wall commitment.

The primary climbing season in Patagonia runs roughly from November through March, during the Southern Hemisphere summer, when temperatures are warmer and days are longer. However, the Fitz Roy massif is notorious for fierce winds and rapidly changing weather year-round, and climbers routinely wait days or weeks in El Chaltén for favorable windows.