Arriondas is a village in the Spanish municipality of Parres, Asturias. It is located where the River Piloña joins the river Sella, in a narrow valley. The convergence of rivers makes it an important place for fishing. The river makes a very good spot for canoeing, and every year the International Sella River Descent is held. This consists of a canoe race down the river Sella to the coastal village of Ribadesella. This competition brings in significant numbers of tourists.