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Great Bay 5K | Race for a Healthy Estuary

location_on

calendar_today 30 Sep, 2026 – 24 Oct, 2026

directions_run Running

language Official Website

sell $30.00 – $35.00

About the Event

REGISTRATION OPENS ON APRIL 1, 2026

The Great Bay 5K is excited to hold its 28th annual race in 2026!  The GB5K is the final race in the popular Seacoast Road Race Series and supports the non-profit Great Bay Stewards. The course passes the shores of Great Bay, and is a fun, fast, scenic, and mostly downhill event.  In 2026, we are pleased to bring back the Great Bay 55K Challenge - run the entire 55 kilometers in one day, or complete the total distance anytime between October 1 - 24. 

Wheelchair racers are welcome and will start at 8:45 a.m., prior to the 9:00 a.m. runner/walker start. No motorized wheelchairs are permitted, and wheelchair racers are responsible for maintaining their own equipment.

Participants in the 5K events will receive a long-sleeve race shirt, and everyone will get a bib with tear strips that you can take to select establishments for free beer or cider. Please keep in mind that you must register by October 1 to get a race shirt. People who register after that may claim a shirt if any remain on race day.

All proceeds from the Great Bay 5K go to the non-profit Great Bay Stewards, which supports conservation, education, community outreach, stewardship, and research of the Great Bay Estuary.

Races Offered

Great Bay 55K

Sep 30, 2026

straighten

Distance — 55K

terrain

Type — Running

timer

09:00

sell

$30.00

Great Bay 5K

Oct 24, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

09:00

sell

$35.00

Weather Overview

These values represent the 3-year monthly averages for September in Stratham.

Temp (°C)
Feels Like (°C)
thermostat 14.1° / 22.2°
wb_sunny 13.2° / 21.7°
Wind (km/h)
Humidity (%)
air 9.8 /
water_drop 78.7%

About Stratham

Learn more about the host city, Stratham.

Scenic view of

Stratham is a town in Rockingham County, New Hampshire, United States. The town had a population of 7,669 at the 2020 census. It is bounded on the west by the Squamscott River. The town is the home of the only U.S. Lindt & Sprüngli factory and the headquarters of the Timberland Corporation.

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