Aiguille du Tacul, Alpine summit in Mont Blanc massif, France

Aiguille du Tacul is a rocky summit of the Mont Blanc massif in Haute-Savoie, rising to 3,444 m according to French sources (3,438 m in Italian ones). Three dark grey and brown spires stand above snow-filled ledges and couloirs, with a broad snow slope running down between the left and right summits and a high snowfield below the lower central pinnacle. The mountain separates the Glacier du Tacul from the Glacier de Leschaux.

Until the late 19th century the summit was known as Périades, a name now reserved for the small group of rocky spires beyond the Col du Tacul. The mountain rises between the Tacul and Leschaux glaciers, and a ridge runs south from it through Les Périades and Mont Mallet to the Aiguille de Rochefort. The sources record no first-ascent date.

Until the late 19th century the summit was called Périades; that name now belongs only to the small group of rocky points across the Col du Tacul. The mountain rises between the Tacul and Leschaux glaciers, and a ridge runs south from it through Les Périades and Mont Mallet to the Aiguille de Rochefort.

Aiguille du Tacul is not served by the Aiguille du Midi cable car; it is reached on foot from the Mont Blanc massif side, between the Tacul and Leschaux glaciers. The summit lies entirely in French territory north of the Dent du Géant, and a ridge runs south from it through Les Périades and Mont Mallet to the Aiguille de Rochefort. Approach and descent cross glacier terrain, so plan for snow and ice on the ledges and couloirs visible on the face.

Until the late 19th century this summit was called Périades; the name now belongs only to the small group of rocky points across the Col du Tacul. The mountain separates the Glacier du Tacul from the Glacier de Leschaux, and a ridge runs south from it through Les Périades and Mont Mallet to the Aiguille de Rochefort.