The Rural Kutxa Semi-Marathon de San Sebastian is a 21 km road race held in San Sebastian, Guipuzcoa, within the Spanish Basque Country. It takes place in October, beginning at City Hall, and attracts approximately 5,000 participants, offering a large-city half marathon atmosphere without being an overwhelming event.
The course remains entirely within the city limits, utilizing asphalt throughout, with no trail or rough terrain. Participants have 2 hours and 30 minutes to complete the race, emphasizing the need for training even for those focused on finishing. Ayad Lamdassem's course record of 1:02:48 indicates the high speed of the leading competitors.