Cuillin and H MacInnes. A longer challenge, known as the "Greater Traverse" includes all the Skye Munros, though omitting some gabbro outliers: this involves continuing on to Clach Glas and Blaven. This traverse was first done independently by two parties, in the summer of 1939, with I Charleson and W Forde claiming precedence over W. H. Murray & R. G. Donaldon a few weeks later (see W. H. Murray's book for details of his traverse). The list below shows all the Munros, Corbetts and Grahams of the Cuillin. It, therefore, excludes peaks such as Clach Glas, which do not meet the
Sweet Grass Hills feet), East Butte (with two peaks, the taller of which at 6,958 ft), and Mount Lebanon (5807 ft). The Sweet Grass Hills are an example of the island ranges that dot the central third portion of the state of Montana. These island ranges, completely surrounded by the 'sea' of plains and not geographically (or often geologically) part of the Rocky Mountains to the west, are "biological hotspots", containing more species than the prairie below. The hills were formed in the early Paleogene period, and geologically are known as stocks - intrusive igneous rock forced up from below and solidified. Because