Acton | Concord | Westford | Sudbury | Lancaster | Bolton | Chelmsford | Lowell

Who We Are


OnYourMarx Race Management is an extension of Marx Running & Fitness Center, a specialty running and walking store located in Acton, MA. Over the past few years, we've had a growing number of race organizers solicit our help and advice in producing local events. In 2013, we felt the need to officially extend our services into the race management arena. After just a little over a year, we are already involved with over 15 races in 8 cities.

Marx Running in Acton

Having a brick-and-mortar location allows us to host packet pickup for all our races, provides a location where people can go to sign up for races, and gives race participants a customer service phone number to call during normal business hours to ask questions about our events. We provide course control equipment, timing services, an official race clock, medals for awards, and we print shirts for all our races. We also have loads of experience developing safety plans and working with town officials to get the proper permits in place.

Mark Coddaire

OnYourMarx Race Management was started by Marx Running & Fitness Owner and Founder Mark Coddaire. Coddaire acts as the managing director and is the primary contact for OnYourMarx Race Management. Over the years he has directed countless races, most notably the Baystate Marathon. Ethan Brown assists with web site development, marketing, timing and race registration services. To contact OnYourMarx, e-mail