Hopkinton against the Tide

JUN
20
2026
Join this family friendly multi sport event in Hopkinton featuring USATF certified 5K and 10K courses. Support breast cancer prevention through swimming, running, or walking in this long running community tradition.
Sat 20 Jun 2026
Recreational ½ Mile Swim Usms-Sanctioned 1-Mile Sw... Competitive 1-Mile Swim Recreational 1-Mile Swim 3-Mile Fitness Walk

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Multi-Sport Event in Hopkinton

Against the Tide is a family-friendly, multi-sport event held in Hopkinton to benefit the Massachusetts Breast Cancer Coalition. Now in its 34th year at this location, the event takes place in a rain or shine environment. Participants can choose between several competitive and recreational activities focused on running, walking, and swimming.

The event features established courses for both running and swimming:

  • 5 km run or walk (USATF certified)
  • 10 km run (USATF certified)
  • Competitive and recreational swim courses

Participants may use wetsuits during the swim portions of the event. To ensure the safety of all participants on the beach, pets and dogs are not permitted, though service animals are allowed.

Registration is available online until the evening before the event, and walk-in registration is also provided on the morning of the activity. There is no early bib pickup; all participants collect their bibs at the registration tent on-site. The event provides opportunities for individuals to form or join teams for fundraising purposes. All proceeds support community education and environmental health programs focused on breast cancer prevention. Visit the organization's website for the most recent information.

10 km
Usatf-Certified 10k Run
3 mi
3-Mile Fitness Walk
5 km
Usatf-Certified 5k Run
Recreational ½ Mile Swim
Usms-Sanctioned 1-Mile Swim
Competitive 1-Mile Swim
Recreational 1-Mile Swim

Events nearby

A multi-discipline event at Hopkinton State Park on May 17, 2026, offering Sprint Duathlon, Sprint Triathlon and team events with age-based entries and tiered pricing. Amenities include a finisher medal, event shirt, BBQ and live results.
Bare Hill Sprint Triathlon, Duathlon and Aquabike in Harvard MA offers sprint-distance triathlon, a relay option, duathlon and aquabike formats. The triathlon is USAT sanctioned and counts for Massachusetts State Championship ranking points.
Experience a fast and scenic triathlon featuring a half mile lake swim, a 12.3 mile bike time trial, and a shaded 4.4 mile run. Join as an individual or part of a relay team and enjoy a signature post race BBQ.