Hornelen is a mountain in Bremanger Municipality in Vestland county, Norway. The mountain sits on the eastern end of the island of Bremangerlandet, along the Frøysjøen strait, in the Nordfjord region of Norway. At 860 metres (2,820 ft), it is the highest sea cliff in Europe (see illustration left), and has for a long time been used as a landmark for naval navigation. It is a 4-hour hike to the summit from Berleneset (across the small fjord from the village of Berle).
The horizontal distance from the summit to the sea is approximately 500 metres (1,600 ft). Approximately 1 kilometre (0.62 mi) to the west of the cliffside is the highest point on the island Bremangerlandet, called Svartevassegga which has an elevation of 889 metres (2,917 ft). The rock in Hornelen consists of sandstone of Devonian age, and it constitutes an important part of the geology of Norway.