Seacoast Half Marathon

04/27/2026

‼️ Price increase ahead ‼️

Join us Sunday, October 25, 2026 for the Seacoast Half Marathon. Lock in your spot before May 1 to save!

100% of the proceeds go directly to local nonprofit, Krempels Brain Injury Center. Come chase your goals while supporting an incredible cause.

Register at www.seacoasthalfmarathon.com!

02/18/2026

The Seacoast Half Marathon is thrilled to announce that our 2026 beneficiary is the Krempels Brain Injury Center!

is a local nonprofit organization dedicated to improving the lives of people living with acquired brain injury. Every mile you train and every step you take on race day will help create meaningful impact right here in our Seacoast community!

And a big thank you to our visionary sponsor, M&T Bank, for their continued commitment and support of the Seacoast Half Marathon and the causes that strengthen our region.

Mark your calendar for race day on Sunday, October 25, 2026! Registration opens soon — stay tuned!

10/25/2025

When you're at the Seacoast Half Marathon tomorrow, keep your eyes open for motivational signs and banners created by Birchtree's students with autism!

WMUR-TV was at Birchtree's day school earlier this month to film students making some of those signs and banners. You can see the story here:

https://www.wmur.com/article/good-vibes-birchtree-center-banners-heart-of-nh/69048033

THANK YOU to WMUR's Heart of New Hampshire team for helping spread the word about our race and its impact on our community!

There will be special banners for the hundreds of runners crossing the finish line at the Seacoast Half Marathon later this month. They were made by students with autism at the Birch Tree Center.

10/24/2025

Please join us in giving a big THANK YOU to all the sponsors who are making this Sunday's Seacoast Half Marathon possible. Because of their generosity, so much more of the race proceeds can go to directly benefit our Seacoast community!

💚 Visionary Sponsor:
M&T Bank

💛 Gold Sponsors:
Auger Building Company
Exeter Hospital, part of Beth Israel Lahey Health

🧡 Bronze Sponsors:
Ambrose Integrative Medicine
JGroup Hospitality
Manulife John Hancock Investments

🩵 Friends of Birchtree Sponsors:
ClearChoiceMD Urgent Care
Henry’s Bagel and Deli
June’s Cafe
St. Mary's Bank

❤️ In-Kind Sponsors
Elements Massage Portsmouth
Feetures
Hoka
Gu
Marathon Sports
OTTO

💙 Course Record Award Sponsor
Northeast Delta Dental

10/20/2025

Important news: The 2025 Seacoast Half Marathon is close to selling out! This is great news but it does mean we need to tap the brakes on accepting new registrations.

Our online registration platform will remain open at www.seacoasthalfmarathon.com until Thursday, 10/23, at midnight EDT.

If you were planning to register in person, please note that we will be accepting in-person registrations ONLY on Saturday, 10/25, at Marathon Sports NH in Portsmouth from 10AM-4PM.

We will no longer be accepting same-day registrations on Sunday, 10/26 (our race day). Please help spread the word to anyone planning on making a last-minute registration decision.

10/19/2025

🏃‍♀️🏃🏼Ready to run one of New Hampshire’s most scenic half marathons?

Join us next Sunday for the Seacoast Half Marathon! 🌊🍂

Online registration closes Thursday at midnight. Grab your spot at www.seacoasthalfmarathon.com!

We can’t wait to cheer you on!

10/08/2025

Thanks to the Portsmouth Herald and Seacoastonline.com for helping spread the word about the 20th-annual Seacoast Half Marathon on Oct. 26th!

It's not too late to join us: you can register to run, walk, or volunteer that day at https://www.seacoasthalfmarathon.com.

THANK YOU to all the runners, walkers, volunteers, sponsors, and donors who are supporting the event this year - including our longtime Visionary race sponsor, M&T Bank. Their contributions support The Birchtree Center's autism programs in local public schools, at Birchtree's day school in Portsmouth, and in our community.

08/27/2025

🎉 The 20th Seacoast Half Marathon is coming up on Sunday, October 26, 2025 and we cannot wait to celebrate every mile with you!

One of the best race traditions is the shirts. Runners wear them with pride long after race day because they’re not just comfy and good looking, they’re a little reminder of the miles you’ve conquered. 💪👕✨

Want to guarantee you get yours in the size that fits just right?
👉 Register by midnight, September 12th to lock in your shirt size.

This milestone year is going to be one to remember!
Register now: www.seacoasthalfmarathon.com

Join us for the Seacoast Half Marathon on Sunday, October 27, 2024!

07/21/2025

🚨 Don’t wait—prices go up August 1! 🚨

Lace up for 13.1 scenic coastal miles and make every step count! 100% of race proceeds goes directly to support The Birchtree Center, a local nonprofit that transforms the lives of local students with autism.

🗓️ Race Day: Sunday, October 26
🔗 Sign up now at www.seacoasthalfmarathon.com or tap the link in our Instagram bio!

06/09/2025

On May 29, we gathered at The 801 to celebrate the 20th anniversary of the Seacoast Half Marathon. Many friends of the race were able to attend, including many of our current volunteer organizing committee along with past committee members, longtime race-day volunteers, past and present beneficiaries, our visionary sponsor M&T Bank, and a few runners who have competed in the race every year since 2006.

Over its 20-year history the race is approaching $2 million raised for Seacoast nonprofits! We're so grateful to the incredible committee members, volunteers, racers, sponsors, and supporters who make the race possible. And thanks also to JGroup Hospitality for their generous support of the evening's festivities. It was a night to remember!