Glockner Group in the context of Johannisberg (Hohe Tauern)

The Großglockner (German: Großglockner [ˈɡroːsˌɡlɔknɐ] ), or just Glockner, is, at 3,798 metres above the Adriatic (12,461 ft), the highest mountain in Austria and highest mountain in the Alps east of the Brenner Pass. It is part of the larger Glockner Group of the Hohe Tauern range, situated along the main ridge of the Central Eastern Alps and the Alpine divide. The Pasterze, Austria's most extended glacier, lies on the Grossglockner's eastern slope.

The characteristic pyramid-shaped peak actually consists of two pinnacles, the Großglockner and the Kleinglockner (3,770 m or 12,370 ft, from German: groß 'big', klein 'small'), separated by the Glocknerscharte col.

The Pasterze, at approximately 8.4 kilometres (5.2 mi) in length, is the longest glacier in Austria and in the Eastern Alps. It lies within the Glockner Group of the High Tauern mountain range in Carinthia, directly beneath Austria's highest mountain, the Grossglockner.

At the height of 3,770 metres (12,370 ft) the Kleinglockner is the third highest mountain summit in Austria. However, with a prominence of only 17 metres it is arguable whether it can be counted as an independent mountain, or just as a subpeak of the Großglockner. It lies in the Glockner Group of Austria's Central Alps, the middle section of the Hohe Tauern. Geographically and geologically speaking, it is viewed a secondary summit of the neighbouring Großglockner, but in the literature, in view of its importance to mountaineering, it is in some cases treated as separate. Its peak forms part of the Glockner crest or ridge (Glocknerkamm) and lies exactly on the border between the Austrian state of Carinthia and Lienz District in the East Tyrol. The Kleinglockner has the shape of a sharp edge, covered with the so-called Glockner Cornice (Glocknerwechte) and, depending on the conditions, can make the ascent of the mountain dangerous to almost impossible. The climbing history of the Kleinglockner is closely linked to that of the Großglockner, because the first climbers, coming from the south and east, had to cross it.

The Ankogel Group (German: Ankogelgruppe) is a sub-group of the Central Eastern Alps. Together with the Goldberg Group, the Glockner Group, the Schober Group, the Kreuzeck Group, the Granatspitze Group, the Venediger Group, the Villgraten Mountains and the Rieserferner Group it forms the mountain range of the Hohe Tauern (High Tauern).

The Ankogel Group is located in the Austrian federal states of Salzburg and Carinthia. Its highest peak is the Hochalmspitze, 3,360 m (AA) (11,020 ft).