It’s the annual Dia de la Tradicion, the annual gaucho fair. Gauchos come to San Antonio de Areco, Argentina, from all over the Pampa to participate in this grand celebration of gaucho skills and traditions.
The horses from dozens of estancias, or ranches, are turned into a huge arena, and allowed to intermingle at random.
The gauchos from each of the participating estancias then enter the arena, leading their respective bell mares, lead horses wearing loud, distinctive bells around their necks, through the herd.
They emerge on the other side with the tropilla, or troop, of horses from their particular estancia separated from all the others and following their bell mare’s lead.