Tacul Glacier, Glacier in Chamonix-Mont-Blanc, France

The Tacul Glacier lies in the Mont Blanc massif, formed around 3,000 m by the union of the Géant Glacier and the Vallée Blanche. It flows between the Aiguilles de Chamonix to the west and the Aiguille du Tacul to the east, its white ice crossed by dark, wavy bands of rocky debris. Near 2,100 m it joins the Leschaux Glacier to create the Mer de Glace.

The Tacul Glacier is fed by the Géant Glacier and the Périades Glacier, whose confluence forms it at about 3,000 metres; the Italian source also names La Vallée Blanche among its feeders. It flows between the Aiguilles de Chamonix to the west and the Aiguille du Tacul to the east. Around 2,100 metres it joins the Leschaux Glacier to give rise to the Mer de Glace.

The glacier carries the name Tacul, shared with the Aiguille du Tacul that rises to its east. Its surface is crossed by dark, curved bands of rocky debris that trace the ice flow, and the Vallée Blanche route runs along its whole length, so skiers and mountaineers cross it every season.

Reaching this site demands alpine skills or a certified mountain guide due to hazardous terrain and crevasse fields. Visitors without climbing experience should arrange guided tours.

The Vallée Blanche ski route runs the full length of the Tacul Glacier, so skiers with a guide cross it from top to bottom. The glacier forms where the Géant and Périades glaciers meet, and at about 2,100 m it joins the Leschaux Glacier to create the Mer de Glace.