boulders canada conifers current fast flow forest landscape mountains natural nature rapids river Rockies rocks Rocky Mountains trees view water height high mountain peak range razor series sharp tall animal antlers Cervus deer drink elk lake male mammal stag thirsty wapiti altitude blue cliff green rock clear moraine reflection shore snow transparent tree cold glacial icy meltwater summit cluster flower group little minute montane patch plant small tiny yellow autumn color colour foliage leaf leaves patchwork cascade conifer descend fall hillside plunge pour Tangle Falls waterfalls