What platform does Amtrak Adirondack leave from? In Yonkers Station yesterday I couldn't see any indication of where to go to board that train.

Thank you all.

There is a big screen in the main lobby with all departures ans arrivals with the track info aa well

Yes, they will also announce tve track on the board

Julia C, AmTrak uses the same platform as the Hudson Line trains to board passengers. then changes tracks. Hope this helps.