2026 Seacoast Half Marathon

The 21st Annual Seacoast Half Marathon is a 100% volunteer-run, community-driven race taking place on October 25, 2026. The scenic 13.1-mile course winds through the historic coastal communities of Portsmouth, Rye, and New Castle, offering runners beautiful views of New Hampshire’s Seacoast. This year’s beneficiary is Krempels Brain Injury Center, with 100% of net proceeds supporting programs and services for adults living with acquired brain injury. Since its founding, the Seacoast Half Marathon has raised nearly $2 million for local nonprofit organizations.