Einserkofel, Mountain summit in South Tyrol, Italy

Einserkofel is a mountain summit in the Sextener Sonnenuhr range in South Tyrol, rising to about 2,698 meters with exposed limestone cliffs and steep rocky slopes. The peak dominates the landscape of Val Fiscalina with its distinctive faces and offers broad views of the surrounding Dolomites from its higher points.

The first ascent was made on 26 July 1879 by Loránd Eötvös with guides Michel Innerkofler and F. Happacher via the south wall, now the normal route. In 1910 Angelo Dibona, with Guido and Max Mayer and guide Luigi Rizzi, climbed the direct north wall, a bold feat for its time. On the night of 26 August 1915 an Alpini patrol under Lieutenant Casali took the summit from the Austrians, who had used it as an artillery observation post.

The German name Einserkofel and the Italian Cima Una both mean "peak one", from its role in the Sexten sundial: seen from the Fischleintal, the sun stands over the summit at 1 p.m. The mountain is also called simply Einser.

Climbers access the summit through established routes starting from Val Fiscalina, with technical climbing gear needed for the upper sections of the ascent. The best conditions for visiting are in warmer months when snow and ice coverage is minimal and rock conditions are more stable.

On 12 October 2007, around 8:40 a.m., a slab estimated at 60,000 cubic metres broke from the Val Fiscalina side of the mountain, raising a dust cloud visible from afar; seismographs in Innsbruck, about 100 km away, recorded it as an earthquake. No one was hurt because the season was late. A second collapse on 20 July 2011 released only about 500 cubic metres.