Boarding gates are usually posted 15 minutes prior to a train's departure. Many stations have monitors and signs that display the boarding gate locations for each train. At many stations, Amtrak customer service representatives will make announcements about boarding times and gate locations.

Get automatic boarding gate notifications in the Amtrak App

You'll automatically receive gate and track notifications right on your phone if you're departing from select stations. Just download the Amtrak app and make sure "Trip Updates & Status" is enabled in the settings.