• Half Marathon
  • 21.1 km
  • Portsmouth
  • Event weekend starts
  • Open entry

Seacoast Half Marathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Decision summary

Seacoast Half Marathon at a glance

Typical conditions
72/100

Historical race-date favourability, not a forecast

Evidence depth
44 verified facts

Source facts available

Route details

Known course facts at a glance

Methodology →

Seacoast Half Marathon has known course details for its half marathon race. The summary below keeps the focus on what is confirmed for the course.

Official distance
21.1 km
Terrain
Road
Scenery
Coastal, Waterfront, City, Historic, Countryside, Forest

Quick answers

What runners ask first

Where can I find the Seacoast Half Marathon route map?

Use the official course links on this page for the organiser route page, map PDF or route download.

Official course links

How hilly is the Seacoast Half Marathon?

The Seacoast Half Marathon is described as gently rolling. The course listing puts the climb at 116 m.

Where does the Seacoast Half Marathon route go?

The Seacoast Half Marathon route starts at Portsmouth High School, 50 Andrew Jarvis Drive, Portsmouth, NH 03801 and finishes at Portsmouth High School, Portsmouth, NH (start and finish at the same site). Underfoot, expect paved city and town roads. It passes Portsmouth Harbor, salt marshes, woodlands, rugged Seacoast coastline and historic homes. Scenic course winding through the historic coastal communities of Portsmouth, urban then rural Rye, and quaint historic New Castle along Route 1A and Route 1B.

What should runners know on race day for the Seacoast Half Marathon?

Five liquid (aid) stations roughly every two miles, with portable toilets just before mile 2 and mile 8. 5.

Race character

Scenery

  • Coastal
  • Waterfront
  • City
  • Historic
  • Countryside
  • Forest

Atmosphere

  • Charity
  • Scenic Tour
  • Community

Terrain

  • Road
Elevation character
Gently Rolling
Technicality
Non Technical
Source-stated ascent
116 m

Entry, logistics and records

Records and field

Men's course record
1:08:02 (Teage O'Connor)
Women's course record
1:17:19 (Andrea Walkonen)

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.
Qualification status
Not a Boston Marathon qualifier (half marathon distance); open registration with no qualifying time.

Race day logistics

Aid stations
5
Bag drop
Five liquid (aid) stations roughly every two miles, with portable toilets just before mile 2 and mile 8.
Medal
Every finisher receives a medal.
Finisher tee
Every registered runner receives a long-sleeve race shirt.

Access and course status

Start
Portsmouth High School, 50 Andrew Jarvis Drive, Portsmouth, NH 03801
Finish
Portsmouth High School, Portsmouth, NH (start and finish at the same site)
Certified course
USATF certified course (certificate NH20001BK).

Course facts

Course type
Loop
Surface
Paved city and town roads
Landmarks
Portsmouth Harbor, salt marshes, woodlands, rugged Seacoast coastline, historic homes, New Castle village, Rye coast
Notable features
  • Scenic course winding through the historic coastal communities of Portsmouth, urban then rural Rye, and quaint historic New Castle along Route 1A and Route 1B. Mile markers throughout with split clocks at 1, 5 and 10 miles

What are typical race-day conditions?

  • 13°CTypical temperature
  • 26 kphTypical wind
  • 3 mmTypical rainfall
  • 72Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.