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-5K - Adults
Organization: Lt. Dennis W. Zilinski, II Memorial Fund
Date of Race: 11-09-2025
Description: The 20th Annual Run With Dennis event is at the hills ...
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Running-5K - Youth
Organization: Keansburg High School
Date of Race: 11-15-2025
Description: The Titan 5k is a run/walk sponsored by the students and ...
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Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 12-13-2025
Description: Tis the season to be running the Holiday ...
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Running-5K - 18 and Under
Organization: Lt. Dennis W. Zilinski, II Memorial Fund
Date of Race: 11-09-2025
Description: The 20th Annual Run With Dennis event is at the hills ...
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Running-5K - Individual Age group/open
Organization: Keansburg High School
Date of Race: 11-15-2025
Description: The Titan 5k is a run/walk sponsored by the students and ...
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Running-Kid Run - Kid Fun Run
Organization: Special Event Services
Date of Race: 11-27-2025
Description: 🎉 10th Annual Run Your Giblets Off ...
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Running-1 Mile - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 02-08-2026
Description: The JC Valentine's Half Marathon, 10K, 5K, 1 MILER ...
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HALF - 13.1 Miler Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 12-07-2025
Description: This course takes you through the natural beauty of ...
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Dec. 14 - Half Marathon - US Resident ...
Organization: Du City Tri Runs, Inc.
Date of Race: 12-14-2025
Description: Join us to run "The Hamilton" on in Brooklyn, USA. This ...
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DEC 14 - 10K - US Resident or ...
Organization: Du City Tri Runs, Inc.
Date of Race: 12-14-2025
Description: Join us to run "The Hamilton" on in Brooklyn, USA. This ...
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10K - Feb 08 - 10k
Organization: Du City Tri Runs, Inc.
Date of Race: 02-08-2026
Description: The JC Valentine's Half Marathon, 10K, 5K, 1 MILER ...
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5K - Feb 08 - 5k
Organization: Du City Tri Runs, Inc.
Date of Race: 02-08-2026
Description: The JC Valentine's Half Marathon, 10K, 5K, 1 MILER ...
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5K - Dec 20 - 9:30 AM - ...
Organization: Du City Tri Runs, Inc.
Date of Race: 12-20-2025
Description: Celebrate the holiday season in Thompson Park with either a 10K, ...
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10K - 10K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 12-07-2025
Description: This course takes you through the natural beauty of ...
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1/2 Miler - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 12-20-2025
Description: Celebrate the holiday season in Thompson Park with either a 10K, ...
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50 Yard Dashers - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 12-20-2025
Description: Celebrate the holiday season in Thompson Park with either a 10K, ...
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The Holiday Half Marathon!
Organization: Trimara Inc.
Date of Race: 12-13-2025
Description: Tis the season to be running the Holiday ...
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Half - Nov 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-23-2025
Description: To race on a ...
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5K - 5K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 12-07-2025
Description: This course takes you through the natural beauty of ...
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NOV 27 - 10K - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-27-2025
Description:
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NOV 27 • 5K - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 11-27-2025
Description:
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10K - FEB 14 - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 02-14-2026
Description: Run, race again for Valentine's ! Celebrate the beginning of the ...
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DEC 14 - 5K - US Resident or ...
Organization: Du City Tri Runs, Inc.
Date of Race: 12-14-2025
Description: Join us to run "The Hamilton" on in Brooklyn, USA. This ...
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5K - Nov 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-23-2025
Description: To race on a ...
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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.
