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

NEW DATE! APRIL 3, 2022

The 14th Annual Great Bay Half Marathon & 5k is returning on Sunday, April 3, 2022 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, two complimentary beers (21+), and plenty of delicious and healthy snacks!

Register Now!

Want to participate in the Great Bay Half Marathon virtually? Learn more here!


View the 2022 COVID-19 PREPAREDNESS PLAN / HEALTH AND SAFETY FAQ
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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 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!

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All participants will take home our incredibly stylish Great Bay Half shirts and a commemorative 2022 finisher’s medal. All runners will also receive free race photos and runners over 21 will enjoy two complimentary beers after the race!

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Ready To Run?

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

Register Today!

Want More Info?

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

Race Details