The term “lateroglacial” defines the ice-marginal areas along the lateral sides of the glacier. The lateroglacial environments grade downglacier into the latero-frontal and proglacial environments. They are composed of specific geomorphological and glaciological landform assemblages, such as ablation depressions, lateral moraines, breach lobes or earth pyramids. Lateroglacial landforms are mostly developed between the glacier and the adjacent valley flank in high mountain landscapes. However, they occur as well in the mountain forelands, especially along dam glaciers or outlet glaciers (e.g., in Iceland), but to a more limited extent. Relict lateroglacial sediments may serve as important geomorphological evidence for reconstructing the extent and ice thickness of former glaciations.