Harbor Marathon
2025
Green Park, Boston — Sunday, October 8. Three distances, one waterfront finish festival, and the loudest cheer squad in New England.
Three Distances, One Party
Choose your challenge: a fast flat 10K, a scenic 20K along the harbor wall, or the full 30K point-to-point. All routes are closed to traffic, marked every kilometer and lined with water stations, bands and cheering zones.
Race Day Schedule
Get Your Entry — $10
Chip timing, race bib, finisher medal and brunch included. Add your ticket to the cart and check out in minutes.
$10/Ticket
Can I switch distances after registering?
Yes — move between 10K, 20K and 30K free of charge until one week before race day from your confirmation email.
Is the course suitable for beginners?
Absolutely. The 10K is flat and fully supported, with a generous 2-hour cutoff and sweep runners throughout.