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: 10-04-2025
Description: With the famous ...
View Race Details View on Map
Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 10-04-2025
Description: With the famous ...
View Race Details View on Map
Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 12-13-2025
Description: Tis the season to be running the Holiday ...
View Race Details View on Map
HALF MARATHON - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-15-2025
Description:
View Race Details View on Map
10K - 10K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 06-28-2025
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
10K - Nov 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-23-2025
Description: To race on a ...
View Race Details View on Map
NOV 27 - HALF - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 11-27-2025
Description:
View Race Details View on Map
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 ...
View Race Details View on Map
OCT 12 - 10K - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 10-12-2025
Description: Please always check our website: http://www.citytri.com for updates. Welcome to ...
View Race Details View on Map
OCT 12 - 5K - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 10-12-2025
Description: Please always check our website: http://www.citytri.com for updates. Welcome to ...
View Race Details View on Map
VIRTUAL ONLY - HALF - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 06-28-2025
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
Half Marathon - RESIDENT or US Citizen ...
Organization: Du City Tri Runs, Inc.
Date of Race: 08-30-2025
Description: Join us to run "The Hamilton" on Labor Day weekend in ...
View Race Details View on Map
10K - RESIDENT or US CITIZEN - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-30-2025
Description: Join us to run "The Hamilton" on Labor Day weekend in ...
View Race Details View on Map
5K - Nov 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-23-2025
Description: To race on a ...
View Race Details View on Map
Half - Oct 5 - 13.1 miles
Organization: Du City Tri Runs, Inc.
Date of Race: 10-05-2025
Description: The JC Green Half Marathon, 10K, 5K ...
View Race Details View on Map
SATURDAY, AUGUST 23, 2025 -10K - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 08-23-2025
Description:
View Race Details View on Map
SATURDAY, AUGUST 23, 2025 -5K - Individual registration
Organization: Du City Tri Runs, Inc.
Date of Race: 08-23-2025
Description:
View Race Details View on Map
10K - Oct 5 - 10k
Organization: Du City Tri Runs, Inc.
Date of Race: 10-05-2025
Description: The JC Green Half Marathon, 10K, 5K ...
View Race Details View on Map
5K - Oct 5 - 5k
Organization: Du City Tri Runs, Inc.
Date of Race: 10-05-2025
Description: The JC Green Half Marathon, 10K, 5K ...
View Race Details View on Map
Day Camper Fee
Organization: Princeton University Sports Camps
Date of Race: 06-29-2025
Description: The JC Green Half Marathon, 10K, 5K ...
View Race Details View on Map
Track & Field Overnight Camp
Organization: Princeton University Sports Camps
Date of Race: 06-29-2025
Description: For day campers the fee includes instruction, meals (lunch daily) and ...
View Race Details View on Map
The New Jersey Fall Half Marathon, 10k, 5k ...
Organization: Du City Tri Runs, Inc.
Date of Race: 11-23-2025
Description: To race on a ...
View Race Details View on Map
The NJ Endurance Classic Half Marathon, 10k, 5k
Organization: Du City Tri Runs, Inc.
Date of Race: 06-28-2025
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
Half - Nov 23 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 11-23-2025
Description: To race on a ...
View Race Details View on Map
5K - 5K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 06-28-2025
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
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]
Races Local Newsletter
Subscribe to get the latest on racing delivered to your inbox, once per week.
Did you know?
The number of U.S. marathon finishers declined from 2014 to 2015 approximately 8 percent.
