2021 - Seacoast Half Marathon
2021 distances
Running
Virtual Seacoast Half Marathon
Run or walk the virtual half marathon course of your choosing between October 23 and October 31. Post your time to RunSignUp when you have finished your race. With this option, you'll get a long-sleeve race shirt, and a half marathon finisher's medal.
Virtual Seacoast Quarter Marathon
Run or walk the virtual quarter marathon course of your choosing between October 23 and October 31. Post your time to RunSignUp when you have finished your race. With this option, you'll get a long-sleeve race shirt.
Virtual SHM 5K
Run or walk the virtual 5K course of your choosing between October 23 and October 31. Post your time to RunSignUp when you have finished your race. With this option, you'll get a long-sleeve race shirt.
Seacoast Combo (Virtual 5K, Quarter Marathon & Half Marathon)
Run or walk the virtual 5K, Quarter Marathon, AND Half Marathon between October 23 and October 31. Post your times on RunSignUp when you have finished each event. With this option, you'll get a long-sleeve race shirt, a Half Marathon finisher's medal.
Seacoast Half Marathon (in-person)
The "live" Seacoast Half Marathon will start and finish at Portsmouth High School, and travel through the beautiful coastal communities of Rye and New Castle, New Hampshire. You'll get a long-sleeve race shirt, and a half marathon finisher's medal.
Race date Weather
Conditions on October 23, 2021 — historical Open-Meteo data.
About Portsmouth
Seacoast Half Marathon takes place in Portsmouth, New Hampshire, United States. The local timezone is America/New_York.
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🏃 Plan Your Next Race in Portsmouth
Find upcoming events by distance:
- Portsmouth 5K Races Best Portsmouth routes for beginners and speed work.
- Portsmouth Running Calendar 2026 See all upcoming race dates.
Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.