The Torres Strait (/ˈtɒrɪs/) is a strait which lies between Australia and the Melanesian island of New Guinea. It is approximately 150 km (93 mi) wide at its narrowest extent. To the south is Cape York Peninsula, the northernmost extremity of the Australian mainland. To the north is the Western Province of Papua New Guinea. It is named after navigator Luís Vaz de Torres, who passed through the Strait in 1606.