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The 19th 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.

Thanks to all who ran in 2018!

If you walked or ran all 5 races in 2018 then you have a jacket coming your way!

We will need your sex specific size no later than December 15th for pick-up during the

Marathon Sports "Ras na hEireann U.S.A. 5Km" tee and bib pick-ups in March (dates to be posted next week).

May 17, 2018

June 28, 2018

July 26, 2018

August 30, 2018

September 13, 2018

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

we now use B-Tag Chip Timing

For regular updates from the Race Director