Hopkinton against the Tide

JUN
20
2026
The 34th annual Hopkinton Against the Tide offers swims, runs, and a walk at Hopkinton State Park. This multi-sport event supports the Massachusetts Breast Cancer Coalition's prevention efforts. Choose from certified 5K/10K runs, various swim distances, or a fitness walk.
Sat 20 Jun 2026
Competitive 1-Mile Swim Recreational 1-Mile Swim Recreational ½ Mile Swim Usms-Sanctioned 1-Mile Sw... 3-Mile Fitness Walk

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Event Overview

This is the 34th annual Hopkinton Against the Tide, a multi-sport event. It takes place at Hopkinton State Park on Cedar Street in Hopkinton, Massachusetts. The event benefits the Massachusetts Breast Cancer Coalition (MBCC), an organization focused on preventing breast cancer from environmental causes.

Event Activities

Participants can choose from several athletic events:

  • USMS-Sanctioned 1-mile swim
  • Competitive 1-mile swim
  • Recreational ½-mile swim
  • Recreational 1-mile swim
  • USATF-Certified 5K run
  • USATF-Certified 10K run
  • 3-mile fitness walk

The 5K and 10K runs have USATF certification codes MA23007BK and MA23006BK, respectively. Wetsuits are permitted for the swims. Dogs and other pets are not allowed on the beach, with the exception of service animals.

Registration and Logistics

All event registrations have a fee of $40. Online registration closes at 5:00 PM on June 19th. Walk-in registration is available on the event day starting at 7:00 AM at the registration tent. There is no early bib pickup; bibs are collected at registration on the morning of the event.

Participants can create or join a team during the registration process, but new teams cannot be created after registration is complete. Refunds are not allowed for this event. The participation of minors under 18 requires authorization from a parent or guardian. 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
Competitive 1-Mile Swim
Recreational 1-Mile Swim
Recreational ½ Mile Swim
Usms-Sanctioned 1-Mile Swim