Question: The Main Western Railway located in Linden, New South Wales, runs through what area?

Context paragraphs:
Leura, New South Wales: Leura (postcode: 2780) is a suburb in the City of Blue Mountains local government area that is located 100 km west of the Sydney central business district in New South Wales, Australia.  It is one of the series of small towns stretched along the Main Western railway line and Great Western Highway that bisects the Blue Mountains National Park.  Leura is situated adjacent to Katoomba, the largest centre in the upper mountains, and the two towns merge along Leura's western edge.

Bathurst Region: The Bathurst Region is a local government area in the Central West region of New South Wales, Australia.  The area is located adjacent to the Great Western Highway, Mid-Western Highway, Mitchell Highway and the Main Western railway line.  At the 2016 census , the Bathurst Region had a population of .

Garw Valley Railway: The Garw Valley Railway is the trading name of the Bridgend Valleys Railway Company Limited.  It operates a short section of railway located in South Wales, which is being recreated as a heritage railway.  Formerly part of the Llynvi and Ogmore Railway (L&OR) and built by the Great Western Railway (GWR), the line was formerly used for freight and passenger services, with most of the track still in place between Brynmenyn and Pontycymer.  The project currently has a train shed at Pontycymer, and hopes to initially offer brake van rides between Pontycymer and Pant-y-Gog, a distance of .5 mi .

Locksley, New South Wales: Locksley is a locality in western New South Wales, Australia.  It is located on the Main Western railway line.  A now-closed railway station opened in 1872.

Linden, New South Wales: Linden is a village in the Blue Mountains of New South Wales, Australia.  It is in the City of Blue Mountains, 81 km west of Sydney and 19 km east of Katoomba.  The village is on the Great Western Highway and has a railway station on the Main Western railway line served by NSW TrainLink's Blue Mountains Line.  It shares a post office, and therefore the 2778 postcode, with adjoining Woodford.  In the 2011 census , its population was 594, including 19 indigenous people (3.2%).

Gemalla, New South Wales: Gemalla is a locality in western New South Wales, Australia.  It is located on the Main Western railway line between Tarana and Locksley.  A railway station was provided between 1907 and 1974.

Linden railway station: Linden railway station is located on the Main Western line in New South Wales, Australia.  It serves the Blue Mountains village of Linden opening in August 1874 as Linden Tank, being renamed Hendersons Platform on 26 October 1874 and Linden in 1879.

City of Lithgow: The City of Lithgow is a local government area in the Central West region of New South Wales, Australia.  The area is located adjacent to the Great Western Highway and the Main Western railway line.

John Whitton: John Whitton (1820, near Wakefield, Yorkshire, England – 20 February 1898), an Anglo–Australian railway engineer, was the Engineer-in-Charge for the New South Wales Railways, serving between 1856 and 1899, considered the Father of New South Wales Railways.  Under his supervision, it is estimated that 2171 mi of railway around New South Wales and Victoria were completed.  Whitton was responsible for the construction of the Blue Mountains railway line and parts of the Main Western railway line, in particular the Great Zig Zag near Lithgow, and much of the Great Southern line.

Main Western railway line, New South Wales: The Main Western Railway is a major railway in New South Wales, Australia.  It runs through the Blue Mountains, Central West, North West Slopes and the Far West regions.

Supporting paragraphs: Linden, New South Wales Main Western railway line, New South Wales
Answer: Blue Mountains, Central West, North West Slopes and the Far West regions