Lisbon day trip train help
 

We are doing day trips from Lisbon to Sintra, Evora, and Tomar. We are staying at the Marriott in Lisbon. Can you tell me which Lisbon train station we should use to these three destinations? Also, how about to Belem? Thanks!

Belem is really more like a suburb than a day trip. You can reach it via tram or train from Cais do Sodré station. You could also uber. While there, don't pass up the maritime museum, it was great!
Evora - think you would be much better off with a car. You can drive around and hit up some of the nearby wonderful Alentejo wineries
Sintra - good info is found here, and keep in mind that you still need to get from the Sintra train station to Pena Palace (if that is your destination) either via the bus, taxi or uber.
Tomar - sorry. can't comment on this as we didn't have time to get there!

www.cp.pt Portuguese Railways site has all the info on stations etc. And easy to use www.bahn.de/en also is very easy to determine all that. Those are regional trains just buy tickets at stations.

Evora is better done by bus if using public transport. Belem is better done by tram. Rossio is the station for Sintra.