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🌟 2025 Details are subject to change! 🌟

Great Bay Half Marathon, 10K & 5K
Race Details

The Great Bay Half Marathon, 10K, & 5K returns in April 2025 with the perfect mix of spectacular views and uphill climbs to “elevate” your run! For race details like start times, course info, and more, select the desired section below.

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Half Marathon

Start Time: 11:00AM
The Great Bay Half Marathon offers a gorgeous but challenging course along the Great Bay estuary, featuring a 3.5 mile section on a well-maintained winding dirt road where runners will experience sightings of bald eagles and great blue herons before a dramatic finish in the heart of historic Newmarket. Just picture yourself on the final downhill stretch of closed downtown streets running past the centuries-old fieldstone mill buildings!

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Start Time: 11:00AM
The newly added 10K will take you around Newmarket’s historic downtown before heading toward the Moody Point on Great Bay. You’ll run near the shores of the cross-grained and wily waters of Great Bay where you’ll have the chance to see the wildlife that inhabits the diverse ecosystem before heading back toward downtown Newmarket to finish off your run.


Start Time: 11:00AM
With the Great Bay 5K, you’ll run (or walk) the same course as the half marathon up to Mile 2, at which point you’ll veer right into town. You will finish with a nice downhill stretch through the heart of downtown before making your way into the post-race party for some extra fun!

Packet Pickup

Packet pickup will take place inside Millspace at Newmarket Mills (55 Main St, Newmarket, NH 03857) from 9:00 AM until 10:45 AM on race day. Please arrive at least 45 minutes before the start time to ensure you have time to park, check-in, and stretch before the race begins. Both the half and 5k will start out front of Millspace to make for a quick walk after grabbing your bib and swag!

Save time on packet pickup by adding on packet mailing at registration! Already registered? Don’t worry! You can add it on through your EnMotive account. Please note, we are unable to mail out packets after the packet mailing deadline has passed.


Parking will be available at Lamprey Health Care, Newmarket Junior/Senior High School, and Newmarket Elementary School on race day. It’s a quick 3/4 mile walk to the starting line, so you can warm up those feet before the big race.

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Post Race Party

The fun doesn’t stop once you cross the finish line! Head over to the American Legion (151 Main Street) after your run for complimentary craft beer (21+), delicious food, and an assortment of healthy snacks—all included with your registration!

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Elite Runners Perks

If you’ve achieved an exceptionally low finish time at marathon or half marathon in the past 18 months, we have a perk for you! Elite runners who meet the qualifying standards below are eligible for a fully comped entry to this year’s race! To apply for a fully comped entry as an elite athlete, please click the apply today bottom below to submit your application!

Male Elite Runner Qualifying Standards


Male Masters Qualifying Standards

  • Masters 40-44 – Sub 2:40 Marathon / 1:30 Half
  • Masters 45-49 – Sub 2:48 Marathon / 1:30 Half
  • Masters 50-54 – Sub 2:55 Marathon / 1:30 Half
  • Masters 55-59 – Sub 3:05 Marathon / 1:40 Half
  • Masters 60-64 – Sub 3:15 Marathon / 1:40 Half
  • Masters 65-69 – Sub 3:25 Marathon / 1:40 Half
  • Masters 70-74 – Sub 3:37 Marathon / 1:40 Half
  • Masters 75-79+ – Sub 3:55 Marathon / 1:55 Half

Female Elite Runner Qualifying Standards


Female Masters Qualifying Standards

  • Masters 40-44 – Sub 3:00 Marathon / 1:44 Half
  • Masters 45-49 – Sub 3:12 Marathon / 1:44 Half
  • Masters 50-54 – Sub 3:22 Marathon / 1:44 Half
  • Masters 55-59 – Sub 3:40 Marathon / 1:50 Half
  • Masters 60-64 – Sub 3:58 Marathon / 1:50 Half
  • Masters 65-69 – Sub 4:15 Marathon / 1:50 Half
  • Masters 70-74 – Sub 5:00 Marathon / 1:50 Half
  • Masters 75-79+ – Sub 5:00 Marathon / 2:10 Half
Standards for both the marathon and half marathon must have been run within 18 months of the 2024 race day to qualify. Elite athlete support (travel, lodging, prize money, and/or food assistance) will not be provided by Ventures Endurance.

Applications must be submitted no later than 30 days prior to the event. Late entries may be accommodated on a case by case basis. If an event sells out and is at capacity, additional elite athlete entries will not be considered. An elite complimentary entry is non transferrable and only applied to the Half Marathon and Marathon distances. Other distances do not qualify.

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2023 medal


The half marathon will award prizes for the top 3 men and women finishers overall, and to the top 3 male and female in the following categories: 19 & under, 20-29, 30-39, 40-49, 50-59, 60-69, and 70+.

The 5K will award prizes to the top 3 men and women finishers overall, and to the top 3 male and female in the following categories: 14 & under, 15-19, 20-29, 30-39, 40-49, 50-59, 60-69, and 70+.

All winners will be contacted within 2-3 business days after the race. There will not be an awards tent or ceremony at the event.