Question: How long is the railway on which Newby Bridge Halt is located?

Context paragraphs:
Newby Bridge railway station: Newby Bridge Halt (also known, historically, as Newby Bridge Platform) is a railway station on the Lakeside and Haverthwaite heritage railway.  It serves the village of Newby Bridge, Cumbria.

Bledlow Bridge Halt railway station: Bledlow Bridge Halt railway station was a halt on the Watlington and Princes Risborough Railway which the Great Western Railway opened in 1906 to serve the Buckinghamshire village of Bledlow.  The opening of the halt was part of a GWR attempt to encourage more passengers on the line at a time when competition from bus services was drawing away patronage.

King's Bridge Halt railway station: Kings Bridge halt was part of the Belfast and County Down Railway system.  King's Bridge Halt opened on 01/11/1929 and closed 01/1942 during the Second World War.

Lakeside and Haverthwaite Railway: The Lakeside and Haverthwaite Railway (L&HR) is a 3.2 mi heritage railway in Cumbria, England.

Elms Bridge Halt railway station: Elms Bridge Halt was a request stop on the former Coleford, Monmouth, Usk and Pontypool Railway.  It was opened on 27 March 1933 to serve the villages near Raglan, Monmouthshire.  It was closed in 1955 following the withdrawal of passenger services on the line.  It was located in a small cutting near a small road bridge about 5 miles and 56 chains from Monmouth Troy.  The halt was of earth and cinder construction, typical of the Great Western Railway.

Albert Road Bridge Halt railway station: Albert Road Bridge Halt (sometimes called Highland Road) was an intermediate station situated on the Southsea Railway, between Jessie Road Bridge Halt and East Southsea.

Tetbury branch line: The Tetbury branch line was a seven and a half mile long single track branch railway line that ran from Kemble railway station on the Great Western Railway's Golden Valley Line to Tetbury via five intermediate stations, Jackament's Bridge Halt , Rodmarton Platform , Church's Hill Halt , Culkerton Halt , and Trouble House Halt .

Jessie Road Bridge Halt railway station: Jessie Road Bridge Halt was an intermediate station situated on the Southsea Railway between Fratton and Albert Road Bridge Halt (sometimes called Highland Road).

Warren Halt railway station: Romney Warren Halt railway station is a station on the Romney, Hythe and Dymchurch Railway in Kent, England.  It has also been known as Warren Halt and Warren Bridge Halt.

Lewknor Bridge Halt railway station: Lewknor Bridge Halt railway station was a halt on the Watlington and Princes Risborough Railway which the Great Western Railway opened in 1906 to serve the Oxfordshire village of Lewknor.  The opening of the halt was part of a GWR attempt to encourage more passengers on the line at a time when competition from bus services was drawing away patronage.

Supporting paragraphs: Newby Bridge railway station Lakeside and Haverthwaite Railway
Answer: 3.2 mi