« All Events This event has passed. Boston Marathon April 21, 2025 @ 9:00 am - 5:00 pm « Group Run EARTH DAY » 129th Boston Marathon. 26.2 miles Hopkington to Boston. Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Date: April 21, 2025 Time: 9:00 am - 5:00 pm Event Category: Races