The Fiesta de San Mateo is an annual celebration held in Logroño, the capital of the La Rioja region in Spain, to honor Saint Matthew, the patron saint of the city. The festival, which has been celebrated for centuries, marks the beginning of the grape harvest and is closely tied to the region's winemaking tradition. It includes parades, music, traditional dances, and wine tastings, with the highlight being the "batalla del vino" (wine battle), where participants throw wine at each other in a joyful and colorful spectacle. The Fiesta de San Mateo is a lively and spirited celebration of local culture, wine, and community, drawing both locals and tourists to the heart of La Rioja.