New England Green River Marathon
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Event overview
The New England Green River Marathon is scheduled for Sunday, August 23, 2026. The course runs from Marlboro, Vermont to Greenfield, Massachusetts. Registration for the 2026 marathon opens on January 1, 2026. The finish area is at Greenfield Community College and includes a finish-line celebration in the shade of maple trees.
Course and certification
The route follows the Green River and passes through an 1870s covered bridge. The course is USATF-certified (MA18003JK) and has a net 1,400 foot drop over a rolling, downhill profile. Because the net drop is less than 1500 feet, the Boston Athletic Association does not apply downhill results indexing for Boston qualification on this course. The course has produced personal best and Boston-qualifying times for runners. FindMyMarathon ranks the marathon as the 17th fastest course in the nation and the fastest in New England. Visit the organization's website for the most recent information.