- a strait that is the main outlet from the Salish Sea to the Pacific Ocean, located between Vancouver Island and northwestern Washington State, with the Canadian-U.S. boundary running through its middle. 100 miles (160 km) long; 15–20 miles (24–32 km) wide.
- a strait between Vancouver Island (Canada) and NW Washington (US). Length: about 129 km (80 miles). Width: about 24 km (15 miles)
