
Do you need reservation on a train travel to Los Angeles
Yes but just on some special accommodation like coach class seat. Not all seat needs reservation though.
It doesn't really matter if you've reserve or not on regular days. But it's always better to have a sure reserved seat on the train schedule you're planning to take. You can also ask for information via a phone call to your local train station. Or you could browse through Amtrak's site and see if there's a seat class the suits you.
This link should help you know the available seat:
http://www.amtrak.com/servlet/ContentServer/Page/1241267361985/1237405732517
Here's a sample seat which shows the advantages of taking coach class:
http://www.amtrak.com/servlet/ContentServer/AM_Accommodation_C/1237405735252/1237405732517

