If you've always wondered how Amtrak's USA Rail Pass works check out my article for a quick overview. It's a great way to plan a trip where you can get on and off the train at different stops and stay a few days or you can be a bit spontaneous and get off somewhere unplanned. Just remember the pass is not a ticket, you still need a reservation and a ticket to get on and off the train and there are a limited # of USA Rail Pass seats available on each segment so you have to reserve seats as early as possible.
Amtrak's USA Rail Pass