Fiestas Patronales de Aranda de Duero
Aranda de Duero's main town festival overlaps with the harvest season and includes wine-themed events, peñas (private wine clubs) celebrations in the underground bodegas, and the 'Fiesta de las Penas' where wine clubs open their subterranean cellars to members and invited guests. The underground bodega network - 136 catalogued cellars with 4.2 km of galleries - is at its most socially active during the September festivities. Lechazo (roast suckling lamb) is the centrepiece gastronomy, paired with local Ribera reds.