Seacoast Half Marathon
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Event overview
The Seacoast Half Marathon is scheduled for October 26, 2025, in Portsmouth, New Hampshire. This is the 20th annual running of the race. The course passes through the coastal communities of Portsmouth, Rye, and New Castle and highlights views of New Hampshire’s Seacoast. The 2025 beneficiary is the Birchtree Center, which supports individuals with behavior challenges, autism, and related disabilities.
Race details
Online registration closes at midnight on Thursday, October 23, 2025. On-site registration and packet pickup are available at Marathon Sports in Portsmouth the day before the race from 10:00 am to 4:00 pm, and on race day at Portsmouth High School from 7:00 am to 8:00 am; on-site registration is listed at $109 (includes fees). Cash prizes are offered for the top three male and female finishers: $250, $150, and $100, with an additional $250 for breaking the course record. HOKA provides prizes for the first-place finisher in each age group. There is also a $250 OTTO Pizza Party gift card prize for the fastest and largest teams. Volunteer opportunities are available in a variety of on- and off-course roles with different start times and lengths. Major sponsors include M&T Bank, Auger Building Company, Exeter Hospital, HOKA, Marathon Sports, and OTTO Pizza. Visit the organization's website for the most recent information.