Tannhorn, Mountain summit in Bern, Switzerland

Tannhorn is a mountain summit in the Emmental Alps standing at 2,221 meters with steep rocky slopes and exposed ridgelines. The peak rises prominently between the Bernese and Lucerne regions, offering distant views across surrounding valleys and lakes.

The summit lies on the border of the municipalities of Brienz and Oberried am Brienzersee in the canton of Bern and Flühli in the canton of Lucerne. The Tannhorn is the southernmost point of the canton of Lucerne. The sources do not state when this boundary was established.

The Tannhorn lies on the boundary of three municipalities: Brienz and Oberried am Brienzersee in the canton of Bern and Flühli in the canton of Lucerne. The summit is the southernmost point of the canton of Lucerne, a cantonal tripoint that walkers on the Brienzergrat cross without notice.

Multiple marked trails lead to the summit, with the Chruterenpass route offering the most straightforward approach for hikers. Visitors should prepare for changeable alpine weather and ensure they have adequate mountain experience.

The Tannhorn is the southernmost point of the canton of Lucerne, although the summit is shared with Brienz and Oberried am Brienzersee in the canton of Bern. The cantonal border runs across the peak itself, so a few steps along the ridge cross from one canton into the other.