Athabasca boulder canada current deluge drop falls fierce flow landscape natural nature plunge pour river rock Rockies Rocky Mountains torrent turmoil water waterfall Banff bank Bow Falls channel conifers danger dangerous foam rage rapids rocks trees violent beach bleached deserted driftwood log ocean peace sand scene sea seashore seaview shore summer sun sunny tranquil view weathered wood America Beauvert blue calm cloud conifer green hill idyllic jasper lake mountain peaceful reflection sky cliff destination direction empty forest highway Icefields Parkway mountains open range road route snow tarmac travel tree altitude bend exercise glacier height high hiking path sunlight track trail Trek turn walk walking holiday lakeside leisure vacation bare bleak craggy difficult hard panorama peak rough shale summit austere dour harsh ice silt stark stern chill cold forbidding freezing frozen icy severe shadow snowy steep