The San Silvestre de Buitrago del Lozoya is a 10 km road race held in the town of Buitrago del Lozoya, Madrid. With an elevation gain of 108 meters, the course runs on asphalt, offering a challenging yet accessible route for runners of all levels. The event, organized by the Buitrago del Lozoya City Council and the Trinorte club, has become a consolidated sporting event to bid farewell to the year in the Community of Madrid. Participants can expect a picturesque setting, characteristic of the northern mountains of Madrid, which adds an extra appeal to the competition. The organization typically includes services such as chip timing and aid stations to ensure the smooth running of the race.