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: 10-03-2026
Description: With the famous ...
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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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10K-SEP 13 - 10K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 09-13-2026
Description: This course takes you through the natural beauty of ...
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10K - Nov 22 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-22-2026
Description: To race on a ...
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5K - Nov 22 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-22-2026
Description: To race on a ...
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Half - Oct 4 - 13.1 miles
Organization: Du City Tri Runs, Inc.
Date of Race: 10-04-2026
Description: The JC Green Half Marathon, 10K, 5K ...
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HALF MARATHON - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-14-2026
Description: Event details and schedule
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10K - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-14-2026
Description: Event details and schedule
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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 Bay Ridge Half Marathon!
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 NJ Fall Endurance Classic Half Marathon, 10k, ...
Organization: Du City Tri Runs, Inc.
Date of Race: 09-13-2026
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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HALF-SEP 13 - 13.1 Miler Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 09-13-2026
Description: This course takes you through the natural beauty of ...
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NOV 26 - HALF - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-26-2026
Description:
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5K - Oct 4 - 5k
Organization: Du City Tri Runs, Inc.
Date of Race: 10-04-2026
Description: The JC Green Half Marathon, 10K, 5K ...
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HALF - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-16-2026
Description: We are proud and excited to hold the First ...
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NOV 26 • 5K - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 11-26-2026
Description:
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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 Fall Half Marathon, 10k, 5k ...
Organization: Du City Tri Runs, Inc.
Date of Race: 11-22-2026
Description: To race on a ...
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The JC Green Fall Half lMarathon, 10k, 5k ...
Organization: Du City Tri Runs, Inc.
Date of Race: 10-04-2026
Description: The JC Green Half Marathon, 10K, 5K ...
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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?
The number of U.S. marathon finishers declined from 2014 to 2015 approximately 8 percent.
