Pilgrimage of San Marcos de San Carlos del Valle Activity · San Carlos del Valle, Campo de Montiel, Ciudad Real Image of San Carlos del Valle, not of the place itself. Country festival that the residents of San Carlos del Valle celebrate every 25 April in honour of Saint Mark, although the village itself does not officially classify it as a pilgrimage. On that day it is traditional for local bakeries to sell the hornazo, a sweet cake with boiled eggs inside, sometimes accompanied by small aniseed sweets or candies, which families share during the day spent together in the countryside. 25 de abril Photo: Bic (CC BY-SA 4.0) What to see and do in San Carlos del Valle