Großer Kaserer, Mountain summit in Tyrol, Austria

Großer Kaserer is a 3,263 m mountain in the Zillertal Alps of Tyrol, part of the Kaserer group with the Falscher Kaserer and Kleiner Kaserer. Its east side lies on the Hintertux Glacier and is glaciated apart from a little rock, while the west flank drops steeply over the Wildlahnerferner into the Schmirntal. A rocky ridge links it to the 3,254 m Falscher Kaserer.

The sources record no first ascent or survey date for Großer Kaserer; the 1850 survey claim is unsupported. The mountain belongs to the Kaserer group with the Falscher Kaserer (3254 m) and Kleiner Kaserer, and is described in the 1996 Alpenvereinsführer Zillertaler Alpen by Heinrich and Walter Klier. Its documented routes run from the Hintertuxer Glacier and from the Schmirntal over the crevassed Wildlahnerferner.

The mountain is known in local speech simply as Haserer, and it belongs to the Kaserer group together with the Falscher Kaserer and the Kleiner Kaserer, which locals call Kaserer. The Falscher Kaserer, 3254 m, is only recognisable as a mountain from the Schmirntal, being a small rise above the Wildlahnerscharte.

Several climbing routes approach the summit, each requiring different levels of fitness and mountain experience. A mountain hut nearby provides shelter and rest options for those attempting the ascent.

The summit is a simple three-thousander: from the Hintertux Glacier cable car station, climbers cross the glacier north of the Wildlahnerscharte and reach the top over boulders with UIAA grade I scrambling. In winter a ski lift runs to just below the summit. The neighbouring Falscher Kaserer (3254 m) is only a small rise above the Wildlahnerscharte.