The Rocky Mountains, or The Rockies, are part of North America's Continental Divide,
                  which separates the Pacific, Arctic and Atlantic basins; they run 4800 km from Alaska
                  to northern Mexico, and for a number of large rivers the Rockies act as either drainage
                  or as a source, including the 
Yukon, Columbia and 
Fraser.
1The 
British Columbia section of the Rockies cover a length of roughly 1200 km, from just shy of the 
Yukon border in the north, to the Canada-Montana state border to the south.
2