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Races in Plainfield, NJ

Running races in or near 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 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.

Road Runner Sports

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 ...

Running-Half marathon - Individual

Organization: Trimara Inc.

Date of Race: 10-04-2025

Description: With the famous ...

Running-Half marathon - Individual

Organization: Trimara Inc.

Date of Race: 10-04-2025

Description: With the famous ...

Running-Half marathon - Individual

Organization: Trimara Inc.

Date of Race: 12-13-2025

Description: Tis the season to be running the Holiday ...

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 ...

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 ...

HALF MARATHON - Individual registration

Organization: Du City Tri Runs, Inc.

Date of Race: 11-15-2025

Description:

10K - Nov. 9 - Individual registration

Organization: Du City Tri Runs, Inc.

Date of Race: 11-09-2025

Description: Location: Prospect Park, Brooklyn, NYC Reference Address:

5K - Nov. 9 - Individual registration

Organization: Du City Tri Runs, Inc.

Date of Race: 11-09-2025

Description: Location: Prospect Park, Brooklyn, NYC Reference Address:

NOV 27 - HALF - Individual registration

Organization: Du City Tri Runs, Inc.

Date of Race: 11-27-2025

Description:

10K - Dec 6 - Individual registration

Organization: Du City Tri Runs, Inc.

Date of Race: 12-06-2025

Description: The seldom-seen Freedom Tunnel will echo with the sound of your ...

5K - 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 ...

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 ...

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 ...

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 ...

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 ...

Half - Feb 09 - 13.1 miles

Organization: Du City Tri Runs, Inc.

Date of Race: 02-08-2026

Description: The JC Valentine's Half Marathon, 10K, 5K, 1 MILER ...

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 ...

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 ...

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 ...

NOV 27 - 5K - 10YR TO 13YR ...

Organization: Du City Tri Runs, Inc.

Date of Race: 11-27-2025

Description:

SATURDAY, AUGUST 23, 2025 - HALF - Individual ...

Organization: Du City Tri Runs, Inc.

Date of Race: 08-23-2025

Description:

10K - Feb 09 - 10k

Organization: Du City Tri Runs, Inc.

Date of Race: 02-08-2026

Description: The JC Valentine's Half Marathon, 10K, 5K, 1 MILER ...

5K - Feb 09 - 5k

Organization: Du City Tri Runs, Inc.

Date of Race: 02-08-2026

Description: The JC Valentine's Half Marathon, 10K, 5K, 1 MILER ...

NOV 27 - 10K - Individual registration

Organization: Du City Tri Runs, Inc.

Date of Race: 11-27-2025

Description:

Road Runner Sports

Complete list of running events in and near Plainfield, NJ: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.


More information about Plainfield

About Plainfield

Plainfield (NJ) is a city in Union County with an estimated population of 49,808.[4]

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In 2014, there were more than 1,100 marathons and more than 541,000 finishers in the U.S.

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