Vries Strait (Пролив Фриза, Proliv Friza), historically also known as the De Vries Strait, is a strait between two main islands of the Kurils. It is located between the northeastern end of the island of Iturup and the southwestern headland of Urup Island, connecting the Sea of Okhotsk on the west with the Pacific Ocean on the east. It has a width of 42 km.