Race Discovery
Thousand Islands Half Marathon, 10K & 5K
Thousand Islands Half Marathon, 10K & 5K logo

2025 - Thousand Islands Half Marathon, 10K & 5K

Wellesley Island, New York, United States View on map
May 16, 2025 – May 17, 2025 (America/New_York local time)
Running

2025 distances

Running

Thousand Islands 5K

***Please note that the 5K will be held on Friday only*** The 5K will be held at the Thousand Islands Winery, 43298 Seaway Ave, Alexandria Bay, NY 13607. A road course with a short loop around the vineyard on grass. 

May 16, 2025 5K 5:00 PM
$43.00
Closed

Island Super Double (5K & 13.1)

***Please note that the 5K will be held on Friday-May 16, 2025 with the start/finish at the Thousand Islands Winery, 43298 Seaway Ave, Alexandria Bay, NY 13607. Start time is 5:00pm The Half Marathon will be held on Saturday morning-May 17, 2025 on Wellesley Island with a start time of 9:00am

May 16, 2025 26.1K 5:00 PM
$113.00
Closed

Island Double (5K & 10K)

***Please note that the 5K will be held on Friday-May 16, 2025 with the start/finish at the Thousand Islands Winery, 43298 Seaway Ave, Alexandria Bay, NY 13607. Start time is 5:00pm The 10K will be held on Saturday morning-May 17, 2025 on Wellesley Island with a start time of 9:30am

May 16, 2025 15K 5:00 PM
$93.00
Closed

Thousand Islands 5K (Virtual)

Thousand Islands 5K Virtual can be run anytime between May 1 and May 31, 2025. Simply go to the race website and submit your time. Please email us at willowrunningNY@gmail.com when completed.

May 16, 2025 5K 5:00 PM
$48.00
Closed

Thousand Islands Half Marathon

A beautiful road course that will take you under the 1000 Islands Bridge and along the St Lawrence seaway!

May 16, 2025 Half-Marathon 8:00 AM
$83.00
Closed

Thousand Islands 10K

May 16, 2025 10K 8:30 AM
$63.00
Closed

Thousand Islands Half Marathon (Virtual)

Thousand Islands Half Marathon Virtual can be run anytime between May 1 and May 31, 2025. Simply go to the race website and submit your time. Please email us at willowrunningNY@gmail.com when completed.

May 16, 2025 Half-Marathon 9:00 AM
$87.00
Closed

Thousand Islands 10K (Virtual)

Thousand Islands 10K Virtual can be run anytime between May 1 and May 31, 2025. Simply go to the race website and submit your time. Please email us at willowrunningNY@gmail.com when completed.

May 16, 2025 10K 9:30 AM
$70.00
Closed

Course

Route map and elevation profile

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.

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Other races near Wellesley Island

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 Wellesley Island event

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