San Silvestre de Bagà is a New Year's Eve 10K race held in Bagà, a town in the province of Barcelona, Spain. It features a mountain-race format instead of a flat city-road course. The race begins at 18:00 and is organized by Amics de l'Atletisme Bagà.
The main 10,000-metre race is complemented by children's races, making it suitable for local families and runners seeking a challenging end-of-year run. Participants receive timed results, aid stations offering drinks and food, a runner's bag, showers, medical support, nearby parking, and trophies for top finishers.