Race Discovery
Great Island 5K
Great Island 5K logo

Great Island 5K

New Castle, New Hampshire, United States View on map
Oct 11, 2026 (America/New_York local time)
Running

About this race

Our 5K is held on one of the most beautiful courses in New England.  It starts and finishes at the Great Island Common at the mouth of the Piscataqua River.  The course runs through the scenic and historic roads of New Castle NH. We have the largest free raffle in New England, great food and a high quality race hat to the first 700 registered. We also offer 3 kids fun runs and a new playground to entertain the whole family

All proceeds of the GI5K go to Charity.

We hope you can join us for the 32nd Great Island 5K!

Pick your distance

Running

5K Run and Walk

The first 700 registered runners/walkers will receive a special high quality race hat!

Oct 11, 2026 5K 10:00 AM
$40.00
Open

Walking

5K Race Walk

The first 700 registered runners/walkers will receive a special high quality race hat!

Oct 11, 2026 5K 10:00 AM
$40.00
Open

Typical race-day weather

Based on 6 years of Open-Meteo archive data for this event's race dates in New Castle, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) 9.6° / Maximum temperature (race-week average) 16.5°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) 7.6° / Maximum feels like — heat index / wind chill (race-week average) 16.4°
Peak wind (km/h)
Strongest wind of the day (race-week average)
19.3
Precip (mm)
Precipitation over the day (race-week average)
2.7mm
Humidity
Mean relative humidity (race-week average)
75.5%
Sunrise
Sunrise at the start line on October 11, 2026 (EDT)
Sunset
Sunset at the start line on October 11, 2026 (EDT)
Daylight
Hours between sunrise and sunset on race day
11h 15m

The sun rises at 6:51 AM and sets at 6:07 PM local time (EDT) in New Castle on October 11, 2026 — 11h 15m of daylight.

Course

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

Reviews

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Results — Great Island 5K

2023 edition View Results
2022 edition View Results
2020 edition View Results

Other races near New Castle

Different organizers, within 40 miles, in the next three months

Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 1 New Castle event

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