The Seacoast Half Marathon is one of the longest-running half marathons in coastal New Hampshire. Join us for our 19th annual race on Sunday, October 27. The Seacoast Marathon is unique in that the net proceeds ALL go to local nonprofit beneficiaries. This year's beneficiary is an amazing nonprofit dedicated to improving lives in the Greater Seacoast. So pick up your running shoes, gather your friends, and register for the feel-good race of the year. And consider going the extra mile for your neighbors in need by making a donation when you register. You can also set up your own fundraising page and get family and friends to help with your fundraising efforts. You can even use your donation/fundraising to earn free registration in the 2025 Seacoast Half Marathon!