San Silvestre Vallecana

The San Silvestre Vallecana is an annual 10 km road race held on 31 December in Madrid, Spain since 1964. It has two editions: a fun run for amateur athletes and an elite race for professional athletes. In 2012, the race achieved its historical record of participants, up to 40,000.

It is based upon the Saint Silvester Road Race, a Brazilian race (held since 1925) which spawned numerous other New Year's Eve races. Along with the Madrid Marathon, the San Silvestre Vallecana is one of the city's foremost annual running events.