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.
The
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.