Huntingdon and Broad Top Mountain Railroad (H&BTM) (reporting mark HBTM) is a former short line railroad company operating passenger and freight service on standard gauge track in south central Pennsylvania. Operational headquarters were in Huntingdon and Saxton, with financial and business offices located in Philadelphia. The primary shop facilities were located in Saxton; auxiliary car shop facilities were at Huntington. Turntables were located at Huntingdon, Saxton and Mount Dallas, Pennsylvania.