The Northern Mountains consist of a series of connected ridges running from northeast to southwest, with the Mentone Plateau forming their southwestern extension. They are of almost Alpine height, with several peaks exceeding 3,000 metres (9,840 feet) and the highest peak, the Mount of Storms, attaining almost 4,000 metres (13,120 feet). Fjords fringe their western and northeastern coasts. On the southern side they are bordered by lowlands through which flows Rockall’s mightiest river, the Aramassa. The Rockall (or Stoney) Mountains and the Scarpland Hills, south of the Aramassa, are outliers of the Northern Mountains.