Hackenbeck Tunnel is a tunnel on Thomas' Branch Line located between Maithwaite and Hackenbeck. It was on the south side of this tunnel that Thomas got stuck in the snow. Mrs. Kyndley lives on the south side of the tunnel. A landslide also happened there one time, and Mrs. Kyndley warned Thomas about it.
The tunnel appeared in the Railway Series books, Tank Engine Thomas Again, Toby the Tram Engine, Stepney the "Bluebell" Engine, More About Thomas the Tank Engine and Thomas and Victoria, as well as the first and fourth seasons of the television series.