Online registration is now closed and no race day registration will be offered. If you’re a registered runner at this weekend’s event, please check your email for very important information regarding the race. You are required to read and take action in the email to attend the race. If you cannot locate this email in your inbox, please check your spam or promotional tabs. If you still can’t find it, please email us at [email protected] and we’ll be able to assist.

Online registration for the 2021 Great Bay Half Marathon & 5K is closed and there will be no race day registration.

The 14th Annual Great Bay Half Marathon & 5k is returning on Sunday, April 11, 2021 for another delightful day of scenic New England running along the Great Bay estuary and historic downtown streets of idyllic Newmarket, NH! Half marathoners begin their race by traversing winding roads complete with captivating views (keep your eyes peeled for bald eagles and great blue herons), culminating with a downhill finish complete with beautifully restored buildings, centuries-old mills, and all the rich history the heart of Newmarket has to offer. Even better, all runners are rewarded with stylish swag, and plenty of delicious and healthy snacks!

What You Get

Unlike other races, your registration for The Great Bay Half Marathon & 5k includes a lot of awesome stuff! Check it out:

Premium Quarter-Zip

All runners receive a mid-weight soft and stretchy running pullover!

Finisher's Medal

Half marathoners also get a Great Bay Half commemorative medal!

Premium Tech Tee

5K runners will get a premium tech tee featuring an innovative polyester honeycomb-weave fabric that’s breathable and slightly stretchy, making them great for running or working out.

CRAFT BEER & Free Pizza

As if all that wasn’t enough, runners 21+ get two delicious Smuttynose craft beers! Plus, all runners get free pizza after the race along with healthy Stonyfield yogurt, energizing granola bars and Hint flavored water!



Early Bird - $59

Through February 14, 2021

Regular - $69

Through March 7, 2021

Last Minute - $79

Through April 7, 2021


Early Bird - $29

Through February 14, 2021

Regular - $39

Through March 7, 2021

Last Minute - $49

Through April 7, 2021

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Ready To Run?

Click the button below to reserve your spot at The Great Bay Half Marathon & 5k!

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Want More Info?

Get all the essential details about the course, parking, packet pick-up, and more!

Race Details