Hunsbury Hill Tunnel is a railway tunnel on the Northampton Loop Line of the West Coast Main Line

West Coast Main Line

The West Coast Main Line is the busiest mixed-traffic railway route in Britain, being the country's most important rail backbone in terms of population served. Fast, long-distance inter-city passenger services are provided between London, the West Midlands, the North West, North Wales and the...

. The tunnel runs in a straight line from the Briar Hill district of the town of Northampton

Northampton

Northampton is a large market town and local government district in the East Midlands region of England. Situated about north-west of London and around south-east of Birmingham, Northampton lies on the River Nene and is the county town of Northamptonshire. The demonym of Northampton is...

, England about north by east to the West Hunsbury district south south of the town. The tunnel has a single bore with twin tracks and is 1152 yards (1,053.4 m) long. It is about 1 mile south of Northampton railway station

Northampton railway station

Northampton railway station is a railway station serving the large town of Northampton and other parts of Northamptonshire in England. Other parts of South Northamptonshire are better served by Kings Sutton, Banbury and Milton Keynes Central stations....

 and the next station south is Wolverton

Wolverton railway station

Wolverton railway station serves northern Milton Keynes, Buckinghamshire, especially Stony Stratford, Wolverton and New Bradwell.The station is served by London Midland local services from Northampton to London on the West Coast Main Line. It is one of the five stations serving Milton Keynes...

. The tunnel opened together with the rest of the loop line in 1881.