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 returned in CGI in Season 21 and became double tracked.
- The tunnel's CGI model is modified from Crosby Tunnel.