High Quality Content by WIKIPEDIA articles! The Croton–Harmon Metro-North Railroad station serves the residents of Croton-on-Hudson, New York via the Hudson Line. It is the main transfer point between the Hudson Line`s local and express service, and it is also served by almost all Amtrak trains on the line. Metro-North trains leave for New York City about every 30 minutes. It is 32.5 miles from Grand Central Terminal. Travel times to Grand Central range from 42 minutes (super-express runs) to 71 minutes (trains making all local stops).