Ben Challum is probably the most famous of the Mamlorn Hills due to its easy access from the A82 in the west and also due to its fine summit ridges. It is usually climbed from Strath Fillan and is an undistinguished trudge from this direction until the final ridge, though the views are fine. A much more exciting ascent route is from the east in Glen Lochay via the eastern ridge as mentioned previously....