Alarde de San Marcial Historical milestone · Irun, Bidasoa Beherea / Bajo Bidasoa, Gipuzkoa Civic-military parade commemorating Irun's victory over French troops at the Battle of San Marcial in 1522, held every June 30. It is declared a fiesta de interés turístico nacional. 30 de junio Photo: Ricardo Martín (Public domain) What to see and do in Irun