Hvannadalshnjúkur (pronounced [ˈkʰvanːaˌtalsˌn̥juːkʏr̥, ˈxʷa-]) or Hvannadalshnúkur[a] Icelandic pronunciation: [-ˌn̥uːkʏr̥] ⓘ is a pyramidal peak on the northwestern rim of the summit crater of the Öræfajökull volcano in Vatnajökull National Park, Iceland.

Its summit is the highest point and the only Ultra-prominent peak in the country.

An official measurement in August 2005 established the height of the mountain as 2,109.6 metres (6,921 ft 3 in).

[5] Earlier surveys had measured a height of 2,119 m or 6,952 ft.[1] The peak is part of the Vatnajökull National Park.