The 128th Boston Marathon is here!
A total of 29,451 participants entered the race this year. GBH News journalists are sharing updates from the course throughout the day. Follow along for the latest.
Here's where to watch and the list of top finishers.
Do you know someone running this year? You can track their progress online.
GBH News' live coverage of the Boston Marathon has ended, but you can find a recap of the day's highlights below.