Seacoast Half Marathon

The Seacoast Half Marathon is an annual scenic race held in Portsmouth, New Hampshire, celebrating its 20th anniversary in 2025. The half marathon course starts and finishes at Portsmouth High School, winding through the historic coastal communities of Rye and New Castle. This event highlights the natural beauty of New Hampshire’s Seacoast and fosters a charitable spirit, as 100% of net proceeds benefit local nonprofits.

Participants receive a long-sleeve race shirt and a medal. The 2025 beneficiary is the Birchtree Center, supporting individuals with behavioral challenges, autism, and related disabilities. The race offers a community-focused, non-corporate atmosphere ideal for runners of all levels. Visit the organization's website for the most recent information.