Ras Dashen (alternatively Ras Dashan or Ras Dejen Ge'ez ራስ ደጀን rās dejen, Amh. "head guard") is the highest mountain in Ethiopia. Part of Semien Mountains National Park, it reaches an elevation of 4,550 metres (14,928 ft).
The widely-quoted elevation of 4,620 metres is inconsistent with all modern surveys and SRTM
A mapping survey of the country in the 1960s and 1970s established an elevation of 4,533 meters. The elevation given here is taken from a 2005 publication by the Ethiopian mapping authority, and is supported to within one metre by a 2007 DGPS
by the system of the Ethiopian Mapping Authority (formerly Agency) gives the spelling "Ras Dejen", which may therefore be considered more correct, the spelling "Ras Dashen" is much more widely used.
The first recorded ascent by Europeans was in 1841
, by the French officers Ferret and Galinier. No verifiable evidence of earlier ascents by locals is provided here, but the summit climate and conditions are relatively hospitable, and there are nearby high altitude pastoral settlements.