• 5K
  • 5 km
  • New Castle
  • Event weekend starts
  • Open entry

Great Island 5K

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

Great Island 5K at a glance

Typical conditions
84/100

Historical race-date favourability, not a forecast

Evidence depth
31 verified facts

Source facts available

Route details

Known course facts at a glance

Methodology →

Great Island 5K has known course details for its 5k race. The summary below keeps the focus on what is confirmed for the course.

Official distance
5 km
Terrain
Road, Trail
Scenery
Waterfront, Coastal, Mountain, Riverside, City, Historic, Countryside, Island

Quick answers

What runners ask first

Where does the Great Island 5K route go?

The Great Island 5K route starts at Great Island Common, 301 Wentworth Road (Route 1B), New Castle, NH 03854 and finishes at Great Island Common, New Castle, NH (start and finish are within the Common, less than 200 meters from the registration center). Underfoot, expect a road course. It passes Great Island Common, Piscataqua River, Atlantic Ocean and historic streets of New Castle. Runs through the historic streets of New Castle and along the banks of the Piscataqua River and the Atlantic Ocean, winding along the waterfront of historic New Castle, typically during peak fall foliage.

Race character

Scenery

  • Waterfront
  • Coastal
  • Mountain
  • Riverside
  • City
  • Historic
  • Countryside
  • Island

Atmosphere

  • Community
  • Charity
  • Festival

Terrain

  • Road
  • Trail
Technicality
Moderate

Entry, logistics and records

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.
Qualification status
None

Race day logistics

Medal
Awards, certificates and merchandise are presented to age-group finishers.
Finisher tee
A high-quality race hat is given to the first 700 registered entrants (rather than a finisher shirt).

Access and course status

Start
Great Island Common, 301 Wentworth Road (Route 1B), New Castle, NH 03854
Finish
Great Island Common, New Castle, NH (start and finish are within the Common, less than 200 meters from the registration center)

Course facts

Course type
Loop
Landmarks
Great Island Common, Piscataqua River, Atlantic Ocean, historic streets of New Castle
Notable features
  • Runs through the historic streets of New Castle and along the banks of the Piscataqua River and the Atlantic Ocean, winding along the waterfront of historic New Castle, typically during peak fall foliage

What are typical race-day conditions?

  • 14°CTypical temperature
  • 16 kphTypical wind
  • 3 mmTypical rainfall
  • 84Favourability /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.