The Lagginhorn is a mountain in the Pennine Alps in Switzerland. It lies a few kilometres north of the slightly higher Weissmies and also close to the slightly lower Fletschhorn on the north. The Lagginhorn is the last four-thousander in the main chain before the Simplon Pass; it is also the lowest four-thousander in Switzerland.
Elevation: 4,010 m (13,160 ft)
Location: Valais, Switzerland
Prominence: 512 m (1,680 ft)
Parent peak: Weissmies
Isolation: 3.3 km (2.1 mi)
Parent range: Pennine Alps
First ascent: 26 August 1856 by E. L. Ames, Franz Andenmatten and Johann Josef Imseng, together with three Englishmen and three guides