Festivities of San Marcos de Montalvos Activity · Montalvos, La Mancha del Júcar-Centro, Albacete Image of Montalvos, not of the place itself. Feast of San Marcos, celebrated in Montalvos (La Mancha del Júcar-Centro, Albacete) on 25 April, one of the dates on the festive calendar of this small municipality of La Mancha, together with that of San Isidro, on 15 May. The municipality also celebrates the Feast of the Tourist in the second week of August and, on 15 August, for the Assumption of the Virgin, a popular day centred on gazpacho manchego. 25 de abril Photo: B25es (CC BY-SA 4.0) What to see and do in Montalvos