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The 17th Annual Marathon Sports "Lets Run, Have Some Fun & Be Fit" Series is a 5Km race summer series that takes place on Thursday nights around the Charles River.

Registration is now open!

new in 2017: B-Tag Chip Timing

We have a few bibs and wristbands left for tonight 7/27 – please see Casey inside the Marsh Post BEFORE 6:45pm.

May 18, 2017

June 29, 2017

July 27, 2017

August 31, 2017

September 14, 2017

All Races Start at American Legion Marsh Post #442, 5 Greenough Blvd, Cambridge, MA

B.A. Event Promotions,

133 Walnut Street #3, Somerville, MA 02145

For regular updates from the Race Director