Hopkinton against the Tide
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Event overview
The 34th Annual Hopkinton Against the Tide is a family-friendly, multi-sport event on June 20, 2026 at Hopkinton State Park in Hopkinton, MA. The event benefits the Massachusetts Breast Cancer Coalition (MBCC), which focuses on prevention of breast cancer from environmental causes. Funds raised support MBCC community education programs, a webinar series, and a student environmental health program. Refunds are not allowed. Participation of minors under 18 requires parent or guardian authorization and a signed Release and Indemnity Agreement.
Races, rules and registration
Events include swims, runs and a walk. Distances offered:
- 1 mile USMS-sanctioned swim (competitive option available)
- 1 mile recreational swim
- 0.5 mile recreational swim
- 5K USATF-certified run
- 10K USATF-certified run
- 3 miles fitness walk
All listed registration fees are $40 each. The 5K and 10K have USATF certification codes MA23007BK and MA23006BK. Wetsuits are permitted. No pets are allowed on the beach except service animals. Bibs are not available for early pickup and must be collected at registration on the morning of the event. Participants can create or join a team during registration; new teams cannot be created after registration is complete. Online registration closes the evening of June 19; walk-in registration is available the morning of the event at the registration tent. Visit the organization's website for the most recent information.