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5KRegistration open

Great Bay 5K | Race for a Healthy Estuary

Stratham, New Hampshire
Entry
$40
Days to go
18
Register for $40 on RunSignUprunsignup.com

At a glance

Date
Oct 24, 2026
Location
Stratham, New Hampshire
Distances
5K
Registration
Registration open until Oct 22, 2026, via runsignup.com
Prize money
Cash awards include top-three awards for male and female runners, competitive walkers, wheelchair racers, and age-graded finishers; course-record, New Hampshire 5K record, Mackenzie Mile, team, and costume awards are also listed.
Prize source
runsignup.comVerified Sep 27, 2026
Official site
runsignup.com
Listed from
RunSignUp
Last checked
Oct 5, 2026

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About this race

REGISTRATION IS NOW OPEN!!

Race Date: October 24, 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. 

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.

Key dates

Registration opens

Apr 1, 2026

Tier 1 ends

Aug 30, 2026

Registration closes

Oct 22, 2026

16d

Tier 2 ends

Oct 22, 2026

16d

Race day

Oct 24, 2026

18d

Pricing

Current price

$40

Tier 2

Ends

Oct 22, 2026

Price progression

Tier 1
$35Apr 1, 2026
Tier 2
$40Aug 31, 2026

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