The Fletschhorn (3,985 m) is a mountain of the Pennine Alps, located between the Saas Valley and the Simplon Valley, in the canton of Valais. It lies in the Weissmies group, north of the Lagginhorn. The Fletschhorn is shown to be 3,993 metres high on the 1:200'000 Swisstopo map. However, the largest-scale map (1:25'000) indicates a precise elevation of 3,984.5 metres above sea level.