Riotuerto (Rutuertu in Cantabrian) is one of the municipalities of Cantabria, lying between the North Coast of the Cantábrican Sea and the mountains of the Cantabrian Sierra. It is part of the ancient merindad (shire) of Trasmiera.
Riotuerto (also referred to as Rutuertu in local parlance) is a municipality in northern Spain, located between the sea and the mountain range of the Cantabrian Sierra. Its history dates back to its inclusion in the old administrative region of Trasmiera.