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

Conquer NH’s Great Bay Half Marathon

Ready for a breathtaking run? The Great Bay Half Marathon & 5K is back on Sunday, March 26th, 2023 with the perfect mix of spectacular views and uphill climbs (you know, enough to take your breath away). Half Marathoners will traverse through beautiful winding roads, the Great Bay estuary, and the historic district of downtown Newmarket, NH! But, don’t let the captivating views fool you, this race is one for the books - and you’ll soon learn that it is one hill of a run. Don’t worry though, we will reward you with stylish swag, complimentary beer (21+), and plenty of delicious and healthy snacks! 

Register Now!

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


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!


All participants will take home our incredibly stylish Great Bay jacket and a commemorative 2023 finisher’s medal. All runners will also receive free race photos and runners over 21 will enjoy complimentary beer 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