The Boston Marathon drives more than $509 million in state and local economic activity during Patriots’ Day weekend.

A new UMass report shows that this year’s Boston Marathon with about 500,000 spectators and more than 30,000 participants boosted the Massachusetts economy by about $500 million.

What is the historic Boston Marathon worth to Boston? Approximately $509.1 million last year, according to the findings of a new economic impact report.

The Boston Marathon delivered a more than $500 million economic windfall to the Massachusetts economy this year.

This year's Boston Marathon generated more than half a billion dollars in economic activity and supported thousand of jobs, the Boston Athletic Association and Meet Boston announced. The bulk of the economic activity generated by the marathon came from visitors — mostly spectators — spending money on travel and accommodations as well as food,