Matirock and the August festivities Activity · La Matilla, Comunidad de Villa y Tierra de Pedraza, Segovia Image of La Matilla, not of the place itself. Between 15 and 16 August La Matilla celebrates San Roque and the Assumption with traditional games of skittles, horseshoe and rana, and with the Matirock, a music festival that gathers the residents of the whole comarca. Photo: Benjamín Núñez González (CC BY-SA 4.0) What to see and do in La Matilla