cliffy green incline mountain plunge rails steep steeply tracks transit transport canada cascade cliff conifer descend fall forest hillside natural nature pour rock Rockies Rocky Mountains Tangle Falls tree water waterfalls bathe crawl dip dive diving fin float girl holiday lake paddle pond pool skindive splash swim swimmer swimming waves aqualung blue cay clear dipper diver fish frogman ledge ocean recreation reef scuba diving sea sport boulders rivulets Athabasca boulder current deluge drop falls fierce flow landscape river torrent turmoil waterfall