Inhabitants and tourist celebrate San Pedro's day with the infamous Batalla del Vino on the Riscos de Bilibio hilltop. Tens of thousands of litres of the tasty local Riojan Wine are used as ammunition.
At 9 o’clock in the morning a procession takes place in the streets of the town. At the head is the mayor on horseback with a banner and following him are the citizens of Haro, all dressed in white with red scarfs. They are carrying jugs, bottles, carboys and whatever you can fill with wine.