A railway line in New South Wales that runs from Central to Lithgow via Blacktown, Richmond, Kurrajong, Bell and Zig Zag in both directions and runs from Central to Lithgow via Blacktown, Penrith, Katoomba, Bell and Zig Zag in the Lithgow direction only.
The Blue Mountains Line does not run between Katoomba and Penrith so it will take me 93 minutes by bus.