FRASER RIVER, BCThe Fraser is the largest river in British Columbia, and it drains about one-quarter of the province. The Fraser River crosses more diverse landscapes than any other Canadian river: it begins as a trickle at the foot of Mount Robson in the Rockies, crosses the dry, desert-like interior of the province, snakes through the treacherous, legendary Fraser Canyon, and finally empties into the Pacific at Vancouver. Dropping 2100 m from source to sea, it is fast and full. Its greatest significance, however, is its population of salmon. Threatened with extinction by man's folly and natural disasters, the salmon have survived in the greatest salmon producing river system in the world.