The Bernese Alps (German: Berner Alpen, French: Alpes bernoises, Italian: Alpi bernesi) are a mountain range of the Alps, located in western Switzerland. Although the name suggests that they are located in the Berner Oberland region of the canton of Bern, portions of the Bernese Alps are in the adjacent cantons of Valais, Fribourg and Vaud, the latter being usually named Fribourg Alps and Vaud Alps respectively. The highest mountain in the range, the Finsteraarhorn, is also the highest point in the canton of Bern.

The Rhne valley separates them from the Chablais Alps in the west and from the Pennine Alps in the south; the upper Rhne valley separates them from the Lepontine Alps to the southeast; the Grimsel Pass and the Aare valley separates them from the Uri Alps in the east, and from the Emmental Alps in the north; their northwestern edge is not well defined, describing a line roughly from Lake Geneva to Lake Thun. The Bernese Alps are drained by the river Aare and its tributary the Saane in the north, the Rhne in the south, and the Reuss in the east.

The Bernese Alps are amongst the three highest major subranges of the Alps, together with the Pennine Alps and the Mont Blanc massif.

The Aletschhorn (4,194 m (13,760 ft)) is a mountain in the Alps in Switzerland, lying within the Jungfrau-Aletsch region, which has been designated a World Heritage Site by UNESCO. The mountain shares part of its name with the Aletsch Glacier lying at its foot.

The Aletschhorn, the second highest mountain of the Bernese Alps after the Finsteraarhorn, is the only one of the higher peaks that lies completely in Valais. It is the culminating point of a chain running parallel with the dividing ridge, and surpassing it in the height of its principal peaks. Standing thus between the principal range of the Bernese Alps and the Pennine chain, it shares with the Bietschhorn the advantage of occupying a central position in relation to the high peaks around it. The Aletschhorn is often thought to command the finest of all the panoramic views from Alpine summits.