In 236 days · Sat, Jun 12, 2027
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Saturday, June 12th, 2027
164 Cedar St, Hopkinton MA
5K · 10K
58–77°F · some rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2026
73–92°F
dry
2025
64–80°F
dry
2024
56–76°F
dry
2023
59–79°F
dry
2022
56–77°F
dry
2021
58–71°F
rain
2020
63–82°F
dry
2019
53–74°F
dry
2018
51–78°F
dry
2017
70–92°F
dry
Best months to race in Massachusetts →
Race-day ready
Everything but the shoes.
Real running socks, a bib belt, anti-chafe — the cheap upgrades that matter.
About this race
35th Annual Hopkinton Against the Tide
June 12, 2027 | 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 11th. 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
Course map
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