Running races in or near South Plainfield, NJ
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local South Plainfield, 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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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 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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The Brooklynite Summer Half, 10K & 5K
Organization: Du City Tri Runs, Inc.
Date of Race: 07-12-2026
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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Half - Aug 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-23-2026
Description: To race on a ...
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10K-July 12 - US Resident or Citizen-July 12
Organization: Du City Tri Runs, Inc.
Date of Race: 07-12-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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5K-JULY 12 - INTERNATIONAL Participant - JULY 12
Organization: Du City Tri Runs, Inc.
Date of Race: 07-12-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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HALF MARATHON - July 12 - INTERNATIONAL - ...
Organization: Du City Tri Runs, Inc.
Date of Race: 07-12-2026
Description: Run Course: Fort Hamilton Base or Virtual Course Reference ...
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5K-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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Running-Half marathon - Individual Age group/open
Organization: Trimara Inc.
Date of Race: 09-20-2026
Description: The Race Guys decided that Prospect Park ...
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The Brooklyn Fall Half
Organization: Du City Tri Runs, Inc.
Date of Race: 11-08-2026
Description: Brooklyn is NYC’s most populous borough and has a rich running ...
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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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The Big Turkey Half Marathon, 10k, 5k 2026
Organization: Du City Tri Runs, Inc.
Date of Race: 11-26-2026
Description:
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Jersey City Summer Half, 10K, 5K 2026
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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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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HALF - 13.1 Miler 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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VIRTUAL ONLY - HALF - Individual Age group/open
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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10K - Nov. 8 - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-08-2026
Description: Brooklyn is NYC’s most populous borough and has a rich running ...
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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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Complete list of running events in and near South Plainfield, NJ: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about South Plainfield
About South Plainfield
South Plainfield (NJ) is a borough in Middlesex County with an estimated population of 23,385.[4]
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Did you know?
Historically, more marathons are run in the month of October than any other month (in the U.S.).
