Seacoast Half Marathon
Portsmouth's Seacoast Half Marathon offers a scenic coastal run with a strong community spirit.
Race Date
Oct 25, 2026
Location
Portsmouth, NH
Quick facts
- Date
- Sunday, October 25, 2026
- Location
- Portsmouth, New Hampshire
- Distance
- Half marathon (13.1 mi)
- Course
- Point to Point
- Terrain
- Road
- USATF certified
- Yes
- Finishers on record
- 17,954
Highlights
Good For
Atmosphere
Course
The Experience
The Seacoast Half Marathon, first run in 2006 and now celebrating its 20th year, is a beloved fixture in coastal New Hampshire. This USATF-certified course promises a fast, flat experience, with a slight net drop and minimal elevation change, making it ideal for personal bests. Runners often travel from around 27 states to participate, drawn by the scenic beauty and the race's growing reputation.
The atmosphere on race day is a blend of competitive spirit and community warmth. With recent fields averaging around 1732 finishers, and a loyal ~22% repeat-runner rate, the event clearly resonates. The course winds through the picturesque Seacoast region, offering glimpses of the ocean and charming New Hampshire landscapes.
Concluding with a festive finish, the Seacoast Half Marathon is more than just a race; it's a feel-good event that supports a local nonprofit. Participants can even fundraise to earn free entry, adding an extra layer of community engagement to this popular coastal half.
Race-provided description
The Seacoast Half Marathon is one of the longest-running half marathons in coastal New Hampshire. Join us for our 20th annual race on Sunday, October 26. This year's beneficiary is an amazing nonprofit dedicated to improving lives in the Greater Seacoast. So pick up your running shoes, gather your friends, and register for the feel-good race of the year. And consider going the extra mile for your neighbors in need by making a donation when you register. You can also set up your own fundraising page and get family and friends to help with your fundraising efforts. You can even use your donation/fundraising to earn free registration in the 2025 Seacoast Half Marathon!
Logistics
Race Day
Sunday, October 25, 2026
Start Time
8:00 AM
Giveaway
T-Shirt
Start Location
Portsmouth High School, Portsmouth, NH, 03801
Course Info
USATF CertifiedCourse Type
Point to Point
Terrain
road
Scenery
Coastal
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
+0.43 m
Separation
1.1%
USATF Certified Course
NH20001BK
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Quality Score
Runner Favorite9419 years running
~1,312 finishers a year
growing or steady
22% returning runners
USATF certified · 5 timing sources · 7 photos
runners from 27 states
winner 1:11:19
typical high 61°F
Race Day Weather
5-year historical avgStart (Low)
45°
Afternoon (High)
61°
Pleasant conditions — light layers at start, comfortable by finish
0.1"
Precipitation
10 mph
Wind
78%
Humidity
Historical Finish Times
How 17,954 finishers actually crossed the line across 19 years.
Most recent
2025
Total finishers
17,954
Median time
2:04:33
Latest turnout
942
States
47
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the Seacoast Half Marathon?
The Seacoast Half Marathon is held on Sunday, October 25, 2026, starting at 8:00 AM.
Where does the Seacoast Half Marathon take place?
It takes place in Portsmouth, New Hampshire.
What distances does the Seacoast Half Marathon offer?
The half marathon (13.1 miles).
Is the Seacoast Half Marathon course flat and good for a PR?
The Seacoast Half Marathon is a ultra-flat, point to point course. The course is USATF-certified, so finish times can be used for qualifying.
How many people run the Seacoast Half Marathon?
HalfRuns has finish records for 17,954 runners who have completed the Seacoast Half Marathon.
HalfRuns editorial — independent, no paid placement.
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