Vilamòs Main Festival Activity · Vilamòs, Val d'Aran, Lleida Image of Vilamòs, not of the place itself. The Festa Major of Vilamòs is held on 15 August, the feast of the Mare de Déu d'Agost; on 29 September a pilgrimage is also held to the hermitage of Sant Miquel. Photo: Isidre blanc (CC BY-SA 4.0) What to see and do in Vilamòs