Dolores Costoyas was born in Buenos Aires and graduated from the Conservatorio Juan José Castro, where she studied with Irma Costanzos. She completed her studies under Miguel Angel Girollet and Eduardo Fernandez. Among her many awards are first prizes in the following international competitions: the Maria Anido (Argentina, 1983), the Circulo-Guitarristica (Argentina, 1985) and the Heitor Villa-Lobos (Argentina, 1987). She came to Europe in 1988 to study early plucked string instruments under the direction of Hopkinson Smith at the Schola Cantorum Basiliensis in Basel, Switzerland. Since finishing her studies, she has performed with various ensembles such as the Concerto Vocale (René Jacobs), Les Musiciens du Louvre (Marc Minkowski), and the Huelgas Ensemble (Paul van Nevel). For the Glissando label, Costoyas recorded Music for Vihuela by Miguel de Fuenllana and Luis de Narváez.