21K Ciudad de Huelva

21K Ciudad de Huelva is a RFEA-homologated half marathon through the coastal Andalusian city of Huelva, Spain. Launched in March 2023 as the city's first officially certified 21.097 km race, it moved to a November date and has run every fall since. The single-loop, largely flat course starts and finishes at Plaza de la Constitucion, tracing Avenida Andalucia and Avenida Italia through the La Orden, Las Colonias and La Merced neighborhoods before returning to the historic center. Four aid stations, at kilometers 5, 10, 15 and 18, support runners along the route, and the course is marked at every kilometer with police-controlled crossings. A companion 5K starts alongside it on the same morning. At the 2025 edition on November 2, roughly 1,400 runners took part, and both course records fell: Kenyan Meshack Kipkurgat Kirwa won in 1:03:05 and Burundian Odile Nintije won the women's race in 1:14:42. Runner Sport Huelva organizes the event with backing from the Diputación de Huelva and the Ayuntamiento de Huelva.