Another option is to go by train from New York City to Pittsburgh. New York's Penn Station serves as a terminal for Amtrak. Amtrak's Pennsylvanian Passenger Train Route runs daily between New York City and Pittsburgh. The train ride from NYC to Pittsburgh takes around nine hours and 20 minutes, according to Amtrak.
If 1 footstep is equal to 1 meter, and there are about 1600 meters in a mile, then there are about 1600 footsteps in a mile.
I dont think there is an exact number, because it would all depend on the size of your step, finding out how many inches are in a mile, you divide that by the length of your step in inches and that would give you the number of footsteps YOU need to reach a mile.