|Via:||Huntingdon, Felixstowe, Harwich|
|Meets:||NCN5, NCN57, NCN50, NCN6, NCN12, RR24, NCN11, NCN13, NCN1|
|Route outline (key)|
NCN51 is a cycle route running across the South Midlands and East Anglia, from Oxford to Colchester via Cambridge and the Haven Ports. From Harwich to Colchester, the route forms part of the EuroVelo 2 Capitals Route and the EuroVelo 12 North Sea Circuit.