The Semien Mountains (Amharic: ስሜን ተራሮች) (or Səmen; also spelled Simien and Simen), in northern Ethiopia, north east of Gondar in Amhara region, are part of the Ethiopian Highlands. They are a World Heritage Site and include the Simien Mountains National Park. The mountains consist of plateaus separated by valleys and rising to pinnacles. The tallest peak is Ras Dejen (4,550 m); other notable heights include Mounts Biuat (4,437 m) and Kidis Yared (4,453 m).