The Fraser River basin in British Columbia is the fifth largest drainage area in Canada, covering almost a quarter of the province. It is the largest river system draining into the Salish Sea. From Mount Robson, the highest peak in the Rockies, the Fraser travels through alpine tundra, pine forests, grassland, desert, and old-growth rainforest to the Georgia Strait. The river and tributaries support 65 species of fish and five species of salmon, and provide important habitat for breeding and migrating birds.
- Counties: Whatcom
- National Estuary Programs: Puget Sound
- Other Watersheds Upstream: Upper Skagit
- Other Watersheds Downstream: Nooksack