21K Burgos tras las Huellas del Cid

21K Burgos tras las Huellas del Cid is a running event in Burgos offered in three distances: 21 km, 10 km, and 5 km. All three are designated as non-competitive, positioning the event as an organized city run rather than a competition focused on rankings. The name references El Cid, the medieval Castilian figure with strong ties to Burgos. However, the published listing does not provide a detailed route beyond the stated distances. Results and classifications are managed by Buscametas, the event's promoter, which also handles services like registrations, streaming, timing, and promotional support.