7 running, swimming, ultra, and other events in Cedar Falls, Iowa

34th Annual Hopkinton Against the Tide

June 20, 2026 | Hopkinton, MA

Against the Tide is a family-friendly, multi-sport event to benefit Massachusetts Breast Cancer Coalition (MBCC). MBCC is the only non-profit in the state dedicated to the prevention of breast cancer from environmental causes. 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 also 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. The participation of minor children under the age of 18 in the Against the Tide events must be authorized by a parent or guardian, and the parent/guardian must sign the Release and Indemnity Agreement.

There is no early bib pickup — bibs can be picked up at registration the morning of the event. Wetsuits are permitted. No dogs or other pets, with exception of service animals, allowed on beach.

Participants can create or join a team during the registration process on Race Roster. Please note that new teams cannot be created after registration is complete.

Online registration closes at 5:00 PM the evening of June 19th. Walk-in registration is welcome the morning of the event at the registration tent starting at 7:00 AM.

Wetsuits are permitted.

For technical support with registering or setting up your fundraising page, please contact Race Roster at +1 855-969-5515 or https://raceroster.com/contact.

If you wish to transfer to a new sub-event, you can follow the instructions here to complete the swap - keep in mind there will be a $1.95 fee to facilitate the change.

Events include:

• USMS-Sanctioned 1-mile swim

• 1-mile recreational and competitive swims

• ½-mile recreational swim

• USATF-Certified 5K and 10K runs

• 3-mile fitness walk

USATF Certification Codes:

• 5K: MA23007BK

• 10K: MA23006BK

Your favorite Cedar Valley running tradition returns! The Sturgis Falls 5K and 10K are back with a bang! Join us on SATURDAY, June 27th in downtown Cedar Falls! Run the 5K or 10K, enjoy post race food from local businesses, followed by the best parade around!

This year's course will use part of the parade route including the start and finish on Main Street in the heart of downtown! Don't miss your chance to run this great race and kick off Sturgis Falls Saturday with your next PR!