Aguja Poincenot, Granite mountain peak in Los Glaciares National Park, Argentina.

Aguja Poincenot is a 3,002-meter granite needle in the Fitz Roy massif of Los Glaciares National Park, south of Monte Fitz Roy, which rises about 350 meters higher. It is part of one of the large nunataks of the Southern Patagonian Ice Field and is marked by a pointed shape and vertical walls. Its east face holds climbing routes up to difficulty VIII+, A4.

The peak is named after French alpinist Jacques Poincenot, who drowned while fording the Río Fitz Roy during the 1952 French expedition to Fitz Roy. The first ascent came in 1962, when Irishman Frank Cochrane and Briton Don Whillans climbed via the southwest face. Later routes on the needle reach difficulties of VIII+, A4.

The peak draws climbers from around the world who gather in El Chaltén before attempting its rock routes. The local town has developed around this climbing culture and shapes the daily rhythm of the area.

The best time to visit is between November and February when weather is more stable and conditions favor technical climbing. El Chaltén serves as the main hub and offers accommodation and equipment services for climbers of all experience levels.

The peak is named after Jacques Poincenot, a French alpinist who drowned while fording the Río Fitz Roy during the 1952 French expedition to Fitz Roy. His remains lie in Puerto Santa Cruz. The needle rises about 350 metres lower than neighbouring Fitz Roy.