Mont Fort is surrounded by several glaciers, the largest being the Glacier de Tortin, on its northwestern side. The second largest is the Glacier du Mont Fort, located on its northeastern side. On its eastern side lies the lower summit Petit Mont Fort (3,135 m). The Glacier du Petit Mont Fort lies between the two summits. There are no glaciers on the south side of the mountain. A small lake named Lac du Petit Mont Fort (2,764 m) lies on the south flank.