The Hérens Valley is one of the main tributary catchments of the upper Rhone River valley. Despite the relative dryness of the climate, many large glaciers are present, thanks to altitudes rising up to 4,357 m a.s.l., reached at the top the Dent Blanche. Many early Lateglacial moraine deposits occur in the northern part of the valley (Euseigne Pyramids, La Luette moraines), whereas moraines from the Younger Dryas are mainly present on its orographic left side. Little Ice Age moraines present a large diversity of facies, from long moraine ridges to thick morainic bastions. The Ferpècle and Arolla catchments contain large glacier forefields, where strong paraglacial activity occurs. Periglacial landforms are also well developed in the valley. In its northern part, large relict rock glaciers are present, among which many are densely vegetated thanks to the schist lithology. Active rock glaciers are concentrated in the southern half of the catchment, where altitudes are higher. The valley presents also a large diversity of solifluction landforms.