The Marathon de Castellón is a road race held in Castellón, featuring a 42.2 km marathon and a 10K race. It takes place in February, organized by C.A. Running Castelló, and the marathon holds a World Athletics Race Label.
The event presents as a city marathon with a structured race format. Athlete press events are scheduled, official results are published, and previous participants include Francis Maina Ngare, Pablo Villalobos Bazaga, Enrique Fernández Pinedo, and Felix Pont Chafer. The weekend includes activities beyond the main races, with school sessions in Parque Ribalta where children can train with invited athletes like Juan Carlos Higuero and Fernando Santander.