v t e Northampton loop
Legend
Birmingham Loop Line Trent Valley line Trent Valley Junction Rugby Hillmorton Junction Rugby Parkway (proposed) Kilsby and Crick Daventry International Rail Freight Terminal (DIRFT) Daventry South Junction Crick Tunnel Watford Lodge Tunnel Long Buckby Althorp Park Church Brampton Northampton– Market Harborough line Northampton Northampton–Peterborough line & Bedford–Northampton line Blisworth Hunsbury Hill Tunnel Roade Hanslope Junction Castlethorpe Wolverton Milton Keynes Central West Coast Main Line

Hunsbury Hill Tunnel is a railway tunnel on the Northampton Loop Line of the West Coast Main Line. The tunnel runs in a straight line from the Briar Hill district of Northampton (north portal: 52°13′20″N 0°54′56″W / 52.2221869°N 0.915454°W / 52.2221869; -0.915454), England about north by east to the East Hunsbury district south of the town (south portal: 52°12′47″N 0°55′10″W / 52.213037°N 0.9193325°W / 52.213037; -0.9193325). The tunnel has a single bore with twin tracks and is 1,152 yards (1,053 m) long.^[1] It is about 1 mile south of Northampton railway station and the next station south is Wolverton in Milton Keynes. The tunnel opened together with the rest of the loop line in 1881.^[2]