The Otemma Glacier is a 7.7 km (4.8 mi) long glacier (2005) situated in the Pennine Alps in the canton of Valais in Switzerland. In 1973 it had a length of 8.7 km (5.4 mi), and an area of 17.5 km2 (6.8 sq mi) but, like most other alpine glaciers, is known to be receding. By 2010 it had receded a further 1.2 km (0.75 mi) from its 1973 position. In summer 2018, the snout zone (terminus) of the glacier collapsed.