Valle de Trápaga-Trapagaran is a town and municipality located in the province of Biscay, in the autonomous community of Basque Country, northern Spain. It is located near Barakaldo, Portugalete and Ortuella. Iron ore has been mined here since Roman times and the two parts of the municipality, which are at different altitudes, are linked by a funicular railway. According to the 2019 census, it has 11,985 inhabitants.