The Wizz Air Cardiff Half Marathon (Welsh: Hanner Marathon Caerdydd) (previously known as the Cardiff Marathon) is an annual half marathon race held in the Welsh capital city of Cardiff, taking place in October. The event was established in 2003, initially alongside the Cardiff Marathon, however, due to the increasing popularity of the Half Marathon, the Marathon distance was dropped after 2006. The race was originally organised by the children’s charity Barnardo’s. Now organised by Run 4 Wales, the race has grown to accommodate up to 27,500 runners.