White Coomb is a hill in the Moffat Hills range, part of the Southern Uplands of Scotland. Its broad summit is the highest point in the range and the registration county of Dumfriesshire, as well as being the fourth highest point in southern Scotland, however, despite this, it is largely concealed by other hills on all sides except its east and south east, making this the …White Coomb is a hill in the Moffat Hills range, part of the Southern Uplands of Scotland. Its broad summit is the highest point in the range and the registration county of Dumfriesshire, as well as being the fourth highest point in southern Scotland, however, despite this, it is largely concealed by other hills on all sides except its east and south east, making this the only direction from which its full scale can be seen.