:Skookum does have a point: a particular article on a mountain range or system probably should only mention the subranges one level down in a hierarchy of ranges. The problem is: I don't know of a canonical source of a hierarchy of ranges - there's peakbagger.com, but that's by no means generally accepted. 

 :The tree of life project must run into something similar for taxonomy of species: it's hard to believe that there is only one gold standard taxonomy - whose taxonomy do you adopt?