Seacoast Half Marathon

The Seacoast Half Marathon begins and ends at Portsmouth High School in Portsmouth, New Hampshire. Walkers start at 8:00 AM, followed by runners at 8:30 AM, on a paved-road half marathon course that travels through Rye, New Castle, and the harbor area. The route offers views of saltwater marshes, forests, town streets, and rugged coastline, featuring some mild rolling hills and a total elevation change of approximately 61 feet. The course descends close to sea level in multiple locations, making it largely flat. It remains open to vehicle traffic, with volunteers stationed along the way. Both runners and walkers participate; one previous event had just under 1,200 finishers. All proceeds after expenses are directed to a local nonprofit, currently Gather, an organization focused on hunger relief in the Greater Seacoast region.