2 events in Jefferson County, New York

From big races to Saturday morning group runs—find half marathon events and connect with the local endurance sports community.

• Thousand Islands Half Marathon, 10K & 5K [runsignup.com]
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  Fri, May 15, 2026 at 5:00 PM

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  Take in the famous views of the Thousand Islands and Thousand Islands bridge. Once again, we will be offering the 5K on Friday evening at the Thousand Islands Winery in Alexandria Bay. On Saturday,...

  Take in the famous views of the Thousand Islands and Thousand Islands bridge. Once again, we will be offering the 5K on Friday evening at the Thousand Islands Winery in Alexandria Bay. On Saturday, we will offer the 10K and Half Marathon on Wellesley Island along with the post-race festivities and awards ceremony. If you are feeling ambitious, you are more than welcome to consider the Island Double (5K & 10K) or the Island Super Double (5K & 13.1M). This event is part The Get Fit Half Marathon Series.

  For 2026 we are returning to the Lake Course Executive Club House (21496 Club House Dr.) for the start/finish for Saturdays Half Marathon & 10K similar to years 2020-2023 & 2025.

  Great views, great courses...always best swag plus we get to help the great people of Alexandria Bay as well as the ACS Booster Club!

  3.1 Miles 5k 6.2 Miles 10k 15k 13.1 Miles 16.2 Miles Half Marathon Run

  21496 Club House Dr., Jefferson County, New York, 13640, United States
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• Sackets Harbor Marathon & Half Marathon [runsignup.com]
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  Sun, Sep 06, 2026 at 7:00 AM

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  Join us for a Boston-qualifying Marathon and Half Marathon through the scenic lake-side village of Sackets Harbor and the surrounding area. This is an out-and-back course with the START and FINISH of...

  Join us for a Boston-qualifying Marathon and Half Marathon through the scenic lake-side village of Sackets Harbor and the surrounding area. This is an out-and-back course with the START and FINISH of both races on Pike Road along the Madison Barracks Polo Field in Sackets Harbor, NY. You will enjoy several miles along Lake Ontario before heading out to some beautiful country roads. Because the views along the lake are so awesome, you will run lake-side again, through the village, with a magnificent finish back at the Polo Field.

  13.1 Miles 26.2 Miles Half Marathon Run

  Jefferson County, New York, 13685, United States
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