Join us for our 20th anniversary race!

Join us for the 20th annual Seacoast Half Marathon on Sunday, Oct. 26, 2025! Starting and finishing at Portsmouth High School, this scenic race takes you through the historic coastal communities of Rye and New Castle, offering stunning views of New Hampshire’s Seacoast.

In a crowded race calendar full of corporate/for-profit races, the Seacoast Half is the only purely local, purely charitable race of its kind. Every participant receives a long-sleeve race shirt and medal, and best of all, 100% of the net proceeds support a deserving Seacoast-area nonprofit!

Beat the August 1 price increase!

Registration now open!

2025 Beneficiary:

The Birchtree Center is a nonprofit organization that builds full and productive lives for individuals with behavior challenges, autism, and/or related disabilities.