We are traveling to Normandy and Mont. St-Michel. Is there train service from that area to Chartres?
Of course train service is nearly everywhere. Probably have to go into Paris and back out to Chartres. Or are you asking about direct train service?
Normandy is a pretty big area, but yes, you can get train service from many of the towns. You will almost certainly have one or more train changes depending on your starting point., but you won't necessarily have to go all the way to Paris. I saw changes in Caen and LeMans from Bayeux, or Rennes and LeMans from MSM. Check the sncf website for exact details
There's no train service to or from Mont St Michel, you have to take a bus or shuttle to connect with the nearest train station, which I think is Pontorson (but you'll want to check that).
You could use the SEARCH window (at top of this window) to see previous posts on connecting from Mont St Michel to other areas by train.
Thank you for your help.