Running races in or near Middlesex, NJ
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Middlesex, NJ area. Races listed here include both walking and running events of various distances — from 1-milers, to 5Ks, to marathons, and everything else in between.
Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 12-20-2026
Description: Tis the season to be running the Holiday ...
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Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 10-03-2026
Description: With the famous ...
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Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 10-03-2026
Description: With the famous ...
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Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 10-03-2026
Description: With the famous ...
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The Brooklynite Fall 10K & 5K
Organization: Du City Tri Runs, Inc.
Date of Race: 10-11-2026
Description: Please always check our website: http://www.citytri.com for updates. Welcome to ...
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The Bay Ridge Half Marathon!
Organization: Trimara Inc.
Date of Race: 10-03-2026
Description: With the famous ...
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10K - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 04-12-2026
Description: Come and celebrate the arrival of Spring running through the beautiful ...
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Less Popular Brooklyn Half Marathon - Individual Age ...
Organization: Trimara Inc.
Date of Race: 05-02-2026
Description: We know there are a lot of other more "Popular" Half ...
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10K - Aug 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-23-2026
Description: To race on a ...
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The 2026 LESS Popular Brooklyn Half Marathon!
Organization: Trimara Inc.
Date of Race: 05-02-2026
Description: We know there are a lot of other more "Popular" Half ...
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New Jersey Summer Half, 10k, 5k @ Battlefield
Organization: Du City Tri Runs, Inc.
Date of Race: 08-23-2026
Description: To race on a ...
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The New Jersey Spring Half, 10k, 5k at ...
Organization: Du City Tri Runs, Inc.
Date of Race: 04-12-2026
Description: Come and celebrate the arrival of Spring running through the beautiful ...
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The LESS Popular Staten Island Half Marathon!
Organization: Trimara Inc.
Date of Race: 03-28-2026
Description: The Staten Island 13.1 will be a 2 ...
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The Holiday Half Marathon!
Organization: Trimara Inc.
Date of Race: 12-20-2026
Description: Tis the season to be running the Holiday ...
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Memorial Day Half Marathon, 10k, 5k
Organization: Du City Tri Runs, Inc.
Date of Race: 05-31-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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The NJ Endurance Classic Half Marathon, 10k, 5k
Organization: Du City Tri Runs, Inc.
Date of Race: 06-21-2026
Description: This course takes you through the natural beauty of ...
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OCT 11 - 5K - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 10-11-2026
Description: Please always check our website: http://www.citytri.com for updates. Welcome to ...
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5K - Aug 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-23-2026
Description: To race on a ...
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5K - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 04-12-2026
Description: Come and celebrate the arrival of Spring running through the beautiful ...
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10K - 10K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 06-21-2026
Description: This course takes you through the natural beauty of ...
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5K - 5K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 06-21-2026
Description: This course takes you through the natural beauty of ...
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OCT 11 - 10K - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 10-11-2026
Description: Please always check our website: http://www.citytri.com for updates. Welcome to ...
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10K-May 31 - US Resident or Citizen-May 31
Organization: Du City Tri Runs, Inc.
Date of Race: 05-31-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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10K-May 31 - INTERNATIONAL Participant: Individual - MAY ...
Organization: Du City Tri Runs, Inc.
Date of Race: 05-31-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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5K-MAY 31 - INTERNATIONAL Participant - MAY 31
Organization: Du City Tri Runs, Inc.
Date of Race: 05-31-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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Complete list of running events in and near Middlesex, NJ: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Middlesex
About Middlesex
Middlesex (NJ) is a borough in Middlesex County with an estimated population of 13,635.[4]
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Did you know?
There were at least 768 marathons scheduled in the United States and Canada in 2016.
