Kvalsundet (Tromsø)

or is a strait in Tromsø Municipality in Troms county, Norway. The 20 km long strait separates the island of Kvaløya from the island of Ringvassøya. The 1-5 km long strait is crossed by the subsea Kvalsund Tunnel. The strait joins the Grøtsundet strait on the south end, about 8 km north of the city of Tromsø.