Of volcanic origin, eroded by Pleistocene glaciation, these five mountains are part of the Rum Cuillin, an extension of the Cuillin on the neighbouring island of Skye. The peaks are popular with climbers and known as the Rum Cuillin Traverse. The view is east, across Glen Harris from a point near Loch Long. From left to right: Barkeval (591m), Hallival (723m), Askival (812m), Trallval (702m) and Ainshval (781m). All are classed as Marilyns, that is hills in the British Isles with a height of at least 150 metres irrespective of final height. Askival and Ainshval are two of the three peaks on Rum classed as Corbetts, mountains between 760 and 910 metres high with a drop of at least 30 metres on all sides. Hallival and Trallval are classed as Grahams, that is mountains in Scotland with heights between 610 metres and 761 metres.