Braeriach or Brae Riach is the third-highest mountain in Scotland and all of the British Isles, after Ben Nevis and Ben Macdui, rising 1,296 metres above sea level. It is in the Scottish Highlands and is the highest point in the western massif of the Cairngorms, separated from the central section by the Lairig Ghru pass. The summit is a crescent-shaped plateau, o…Braeriach or Brae Riach is the third-highest mountain in Scotland and all of the British Isles, after Ben Nevis and Ben Macdui, rising 1,296 metres above sea level. It is in the Scottish Highlands and is the highest point in the western massif of the Cairngorms, separated from the central section by the Lairig Ghru pass. The summit is a crescent-shaped plateau, overlooking several corries.