The Fen Line is a railway line in the east of England that links Cambridge in the south to King's Lynn in the north. The line runs through Cambridgeshire and Norfolk and the name of the line refers to the Fens which cover parts of Cambridgeshire, Norfolk and Lincolnshire. It is 41 miles 47 chains (66.9 km) in length and has eight stations.

Cambridge railway station is the principal station serving the city of Cambridge in the east of England. It stands at the end of Station Road, 1 mile (1.6 km) south-east of the city centre. It is the northern terminus of the West Anglia Main Line, 55 miles 52 chains (89.6 km) down the line from London Liverpool Street, the southern terminus.