Athabasca boulder canada current deluge drop falls fierce flow landscape natural nature plunge pour river rock Rockies Rocky Mountains torrent turmoil water waterfall blue calm canoe canoeists clear cliff fun lake leisure moraine mountains paddle peaceful pleasure rocks sport tranquil altitude bend destination direction exercise glacier height high hiking mountain path snow sunlight track trail travel Trek turn walk walking conifers forest green holiday lakeside road summer trees vacation view austere bank bare bleak dour harsh ice peak range silt stark stern summit chill cold forbidding freezing frozen icy severe shadow snowy steep craggy difficult hard jasper panorama rough shale bighorn bighorn sheep Camp camping climb colorado hike mountain sheep Mt. Evans rocky mountain sheep wild wildlife foot