Seacoast Half Marathon

In-Person: Oct. 31, 2021 Virtual: Oct. 23-31, 2021 Portsmouth, NH 03801 US
Race Website

Additional race information can be found at


The Seacoast Half Marathon is one of the longest-running half marathons in coastal New Hampshire. This year, we are offering a suite of in-person and "virtual" options. The in-person half marathon will, as long as state and local officials permit it, be run on Sunday, October 31. With each virtual option, you decide where to run or walk, and when (between October 23 and October 31). We've made this decision because it is the best way we can give you options, based on your level of comfort being around a large group of other racers.  The virtual options include a 5K, a quarter marathon (6.55 miles) and/or the half marathon. All racers will be able to download a personalized race bib, and a finisher's certificate after you post your finishing time. In addition, you'll get a finisher's medal (half marathon). The Seacoast Marathon is unique in that ALL of the revenue (after race expenses) goes to local non-profit beneficiaries. This year's beneficiary is Cornerstone VNA. So please make a donation to Cornerstone VNA when you register, and/or set up your own fundraising page to get family and friends help your fundraising efforts. You can use your donation/fundraising to earn free registration in the 2022 Seacoast half Marathon!

Race Contact Info

If you have any questions about this race, click the button below.

Seacoast Miracle Mile Sponsor
Finish Line Sponsor
Adopt-a-Mile Sponsor
Friend of the Seacoast
Seacoast races FAQs
  • Where will the race start and finish?

The Seacoast Half Marathon will start and finish at Portsmouth High School, Portsmouth, NH.

  • What time is pick-up on race day, and when does the race start?

Packet pick-up will open at 7:00 on Sunday, Oct. 31. Walkers will start at 8:00, and runners will start at 8:30. If staggered starts are required, start times will be adjusted appropriately, and all racers will be notified of the change.


   • Where should you race?

Anywhere you want, as long as you are following local laws, and current state and local coronavirus guidelines. You can be on local roads, trails, or even a treadmill. In these virtual races, you can even take your pet along. Keep in mind, if you are on the roads, that there won't be any course marshals, traffic control, or water stops (unless you create your own water stop), so be vigilant and be safe.

   • When should I run/walk my race?

You can race anytime from October 23 until the end of the day on October 31. Pick the time and weather conditions that work best for you.

   • How do I download my race bib?

Log into your RunSignUp user profile, created when you registered, at www.runsignup/profile Once signed in, click on "View Pre-Race Bib" located at the end of the list of actions on the right side of the page. Click "Print" to download and wear your bib. As long as you are there, use the social sharing tools to promote your participation to your family and friends!

   • How can I get my race shirt?

Race shirts will be available for pick-up at Runners Alley in Portsmouth, NH on Saturday, Oct. 30, and at race sign-in on race day, Oct. 31. If you registered for the Half Marathon, you will also receive a finishers medal. If you are doing a virtual race, you can also choose to pick up your shirt at two other Runners Alley locations, or we can mail it to you for a $10 shipping/handling charge.

   • How do I submit my time?

Scroll to the top of this page and click "Results" in the top navigation. Follow the prompts to log back into your user profile and click the blue "Submit Virtual Results" button.

   • Is this a charity race?

Yes it is! 100% of the proceeds go to Cornerstone VNA, our non-profit beneficiary for 2021. Cornerstone VNA's mission is to promote the
optimum level of well-being, independence and dignity of those living in the community by providing trusted, compassionate and expert health care. You can learn more about Cornerstone VNA at

If you have created a fundraiser page, please remember that the deadline for donations is October 31 at 11:59PM. Thank you for supporting Cornerstone VNA!

   • Who can I contact if I have more questions?

Send an email to  We'll get back to you as quickly as we can.


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