The Wetterhorn (3,692 m) is a mountain in the Swiss Alps close to the village of Grindelwald. Although it was first climbed in 1844, the ascent by Alfred Wills, a young pine tree and party in 1854 is the more celebrated, and is generally regarded to have marked the beginning of the golden age of alpinism.

The mountain is composed of three distinct peaks that lie close together: the Wetterhorn (most visible from Grindelwald), the Mittelhorn (the highest) and the Rosenhorn.