The Semi de Granollers, also known as the Mitja Marató de Granollers, is a 21.097 km road half marathon held in Granollers, near Barcelona. It takes place on asphalt and is a fixture in European road running, with participants aiming for fast times on a course that requires careful pacing.
The route goes through wide avenues in urban and peri-urban areas, passing Les Franqueses del Vallès and La Garriga. Runners encounter an uphill section, a gradual incline, and then a long downhill stretch suitable for personal best attempts.