Against the Tide is a family-friendly, multi-sport event to benefit the Massachusetts Breast Cancer Coalition (MBCC). The funds raised through Against the Tide help to support and expand our community education program Let’s Talk Prevention: Reducing Toxic Exposures, MBCC Webinar Series, and the newly-expanded student environmental health program, Let’s Talk Prevention: Actions You Can Take.

We are grateful to all of you who help prioritize breast cancer prevention. Above and beyond your commitment to participate in the Against the Tide event, we hope that you will create or join a team and fundraise on behalf of MBCC and our important mission to change the legacy of breast cancer for future generations. Refunds are not allowed for this event.

If you are unfamiliar with the process to create or join a team and fundraise, scroll down to the Event Information section below for helpful documents. Also available is a fundraising pledge sheet to help record and track your fundraising!

Click below to register for Against the Tide or donate to a participant or team:

Virtual Event Information: By registering for any single virtual event component, you will be able to submit results to any, or all, of the events you would like to virtually participate in. That means you have two months to build your team and fundraise as well as to participate in as many virtual Against the Tide components that you want!

Event Information

Route Maps

USATF Certification Codes

  • Brewster 5K: MA23006BK
  • Brewster 10K: MA23007BK
  • Hopkinton 5K: MA15005BK
  • Hopkinton 10K: MA15006BK

USMS Open Water Sanction Numbers

  • Brewster: 024-W003
  • Hopkinton: 024-W004

MBCC deeply appreciates the generous support provided by our Against the Tide sponsors; click HERE to see our full list of sponsors!

WCVB Channel 5 is a proud media partner for Massachusetts Breast Cancer Coalition’s Against the Tide

After Against the Tide, post your pictures to!