Los momoxarros de Urdiain Activity · Urdiain, Sakana, Navarra Image of Urdiain, not of the place itself. The carnival of Urdiain keeps alive the tradition of the "momoxarros," masked figures who took to the streets every year even during the Franco-era ban. The village also celebrates San Pedro on the Sunday following 29 June, sharing the date with neighboring Alsasua. Photo: Julio Ruiz de Alda (Public domain) What to see and do in Urdiain