Fen Causeway or the Fen Road is the modern name for a Roman road of England that runs between Denver, Norfolk in the east and Peterborough in the west. Its path covers 24 miles (39 km), passing March and Eldernell before joining the major Roman north–south route Ermine Street west of modern-day Peterborough. It provided a link from the north and west of England to East Anglia.