Boston Marathon is expected to be a great day for runners and spectators based on the weather forecast.The weather changes every year, but the challenging 26.2 mile course does not. Boston Marathon 2025 route mapHere's a map of the route through eight communities from Hopkinton to Boylston Street in Boston.

The Marathon forecast is calling for mostly sunny skies with highs likely reaching the upper 50s or 60. There's a slight chance of a shower at night.