Boloencierro of Mataelpino Activity · El Boalo, Cuenca del Guadarrama, Madrid Image of El Boalo, not of the place itself. During the festivities of San Bartolomé the residents run in front of a ball of almost three hundred kilos and more than two and a half metres across, which rolls some seven hundred metres down the street; the idea was born around 2009 as an alternative to the bull run. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in El Boalo