The Castellón Half Marathon begins and ends at Parque Ribalta in Castelló de la Plana, on Spain’s east coast. It is a January road half marathon on a certified, flat two-lap circuit through paved city streets, with cool running weather typically between 8°C and 16°C. The race is organized by Unió Atlètica de Castelló and approved by the Spanish athletics federation, making it suitable for runners seeking a fast half marathon and for locals participating in a long-standing city event.
The course is straightforward: two urban laps, flat roads, aid stations with water and gels, and a finish area with oranges, bananas, and snacks. Bands, drums, trumpets, singing, and roadside cheering add to the route's atmosphere. The race started in October 1984, with Isabel Fuster and Luis Adsuara winning the first edition, and it is now the oldest footrace in the province of Castellón. Recent editions have attracted record participants, though some runners have noted that traffic closures can be partial, which might be a consideration if aiming for a fast time in a dense pack.