The 21K Ciudad de Huelva is a half marathon held in Huelva, Spain. It begins and ends at Plaza de la Constitución. The race takes place in early November, covering the standard 21.097 km. The course is approved by the Real Federación Española de Atletismo and is listed on the Spanish national race calendar. Organizers state the route showcases appealing areas of the city while maintaining a pace suitable for Huelva’s streets.
The Ayuntamiento de Huelva and Runner Sport Huelva organize the event. It originated from local requests for an official RFEA-approved half marathon. Each kilometer is marked, aid stations are provided along the course, and intermediate cut-off times ensure the race progresses. Both licensed and unlicensed runners aged 18 or older on race day may participate, welcoming both club athletes and recreational runners.