<P> If Hudson Bay is considered part of the Atlantic, then the triple point is at an unimportant - looking, permanently snow and ice covered hump on the border between Alberta and British Columbia, on the southern slope of Snow Dome at 3,456 metres (11,300 ft). The exact location of this potential triple point is somewhat indeterminate because the Columbia Icefield and the snow on top of it shifts from year to year . The snow that falls on it (about 10 metres (33 ft) per year) doesn't actually flow downhill as water, but creeps downhill in the form of glacial ice . </P> <P> That ice flows down the Athabasca Glacier to the Arctic Ocean via the Athabasca and Mackenzie Rivers . Ice flowing west goes to the Pacific Ocean via Bryce Creek and the Bush and Columbia Rivers . Ice flowing down the Saskatchewan Glacier goes via the North Saskatchewan, Saskatchewan, and Nelson Rivers into Hudson Bay . </P> <P> While Triple Divide Peak (or, alternatively, Snow Dome) is the world's only oceanic triple divide, there are secondary triple divide points wherever any two continental divides meet . North America could be considered to have five major drainage systems: into the Pacific, Atlantic and Arctic Oceans, plus Hudson Bay and the Gulf of Mexico . Other sources such as the International Hydrographic Organization add a sixth: Canada's Northwest Passage basin . Using just the five, there are four secondary continental divides and three secondary triple points, the two mentioned previously and a third near Hibbing, Minnesota where the Northern Divide intersects the Saint Lawrence Seaway divide . Since there is no true consensus on what a continental divide is, there is no real agreement on where the secondary triple points are located . However, the main Continental Divide described in this article is a far more distinctive geological feature than the others and its two main triple points are much more prominent . </P> <P> The Continental Divide Trail (CDT) follows the Divide through the U.S. from the Mexico--US border to the Canada--US border . The trail itself is a corridor of pathways - i.e. dedicated footpaths or back roads, either on or near the Continental Divide . A less - developed Canadian extension called the Great Divide Trail continues through five national parks and six provincial parks, ending at Kakwa Lake in east - central British Columbia . </P>

Which of these rivers doesn't flow from east to west