Barroselas is a former civil parish in the municipality of Viana do Castelo, Portugal. In 2013, the parish merged into the new parish Barroselas e Carvoeiro. On the 2001 census, Barroselas had a total population of 3,799. The total area is 7.47 km² which gives a population density of 508,6 inhabitants/km².SWR FestThe area is probably best known internationally for the annual heavy metal festival SWR Barroselas Metalfest which began in 1998. The event has grown steadily larger with each year - even sprouting its own smaller splinter events - and has played host to numerous bands from across Europe and the world.