The Fraser River is the longest river within British Columbia, Canada, rising at Fraser Pass near Mount Robson in the Rocky Mountains and flowing for 1,375 kilometres, into the Strait of Georgia at the city of Vancouver. It is the 11th longest river in Canada. The river's annual discharge at its mouth is 112 cubic kilometres or 3,550 cubic metres per second, and it discharges 20 million tons of sediment into the ocean. The river is named for Simon Fraser, who led an expedition on behalf of the North West Company from the site of present-day Prince George almost to the mouth of the river