Desafío Cántabro OCR is an obstacle-course race held in Viérnoles, Cantabria, northern Spain. The primary event covers 8 kilometers, with distinct categories for teams, general participants, and elite or age-group competitors.
The event also features shorter 4 kilometer races for walkers and younger general runners, ensuring the day includes more than just competitive OCR athletes. Families and children have their own event with Desafío Kids, and the Familia Amara race is designated as 100% charitable.