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Seacoast Half Marathon & 5k
October 26, 2025
Portsmouth
Road
500-1000
Fast & Flat
Small Town
High: 51°
/ Low: 33°
Overview
Run, walk, or jog through the saltwater marshes, woodlands, and rugged coastline of New Hampshire’s Seacoast at the Seacoast Half Marathon. 100% of proceeds after expenses goes to this year’s local non-profit beneficiary Gather, an amazing organization dedicated to making the Greater Seacoast a hunger-free community.
Largely fast and flat, the Seacoast race offers participants a scenic tour of Portsmouth as well as the nearby towns of Rye, New Castle and the harbor. Just under 1,200 runners and walkers crossed the finish line at the race’s 2016 running.
Course Description
The loop course takes place entirely along paved city and town roads, and starts and finishes at the Portsmouth High School grounds.
Several gentle, rolling hills are found along the course but none would be considered challenging, as the course offers a total elevation change of about 61 feet, dropping to about sea level at several points throughout the race.
Runners (who start at 8:30 AM) and walkers (8:00 AM) are cautioned to remain on the lookout for traffic throughout the race, as the course will remain open to auto traffic (though volunteers will be placed throughout the course to direct traffic away from race participants).
