Our friend Ari had a great idea for a consolidated schedule that incorporates the extra trains announced for Marathon Monday.
For the first time the MBTA is selling a $20 "all day" pass that will allow unlimited travel anywhere on the Framingham-Worcester line all day Monday April 17, 2017. Someone commented that the pass should really be applicable for the ENTIRE commuter rail network so that spectators can travel from other lines to the Framingham-Worcester line for the marathon. Regardless, the all day ticket is an innovative idea that might have applicability to other large events. I might have to buy one just for the novelty / collectible ticket (and it's only a few dollars more than my usual roundtrip ticket). [Update 4/14/17...I did buy one...]
Here is a nice map showing how the Framingham-Worcester line parallels the Marathon route (click on it for a PDF):
NOTE: Starting at 8 PM on Sunday night for the Framingham-Worcester line, and for the entire MBTA system all day Monday, NO bikes are allowed. That includes folding bikes. NO folding bikes allowed. The entire MBTA system is typically very crowded Monday, so it is a rule to preserve capacity for people.