Running races in or near Mountainside, NJ
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Mountainside, 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 ...
View Race Details View on Map
Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 12-20-2026
Description: Tis the season to be running the Holiday ...
View Race Details View on Map
Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 10-03-2026
Description: With the famous ...
View Race Details View on Map
Running-Half marathon - Individual
Organization: Trimara Inc.
Date of Race: 10-03-2026
Description: With the famous ...
View Race Details View on Map
CP-CE1 Running Club FRI
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CP-CE1 Running Club FRI
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CP-CE1 Running Club WED
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CP-CE1 Running Club WED
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CE2-CM1-CM2 Running Club FRI
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CE2-CM1-CM2 Running Club WED
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CE2-CM1-CM2 Running Club WED
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
CE2-CM1-CM2 Running Club FRI
Organization: Lycee Francais de New York
Date of Race: 09-08-2026
Description: Join Kicks Run Club and watch your child build confidence, endurance, ...
View Race Details View on Map
Running-Half marathon - Individual Age group/open
Organization: Trimara Inc.
Date of Race: 09-20-2026
Description: The Race Guys decided that Prospect Park ...
View Race Details View on Map
The NYC Skyline
Organization: Du City Tri Runs, Inc.
Date of Race: 11-14-2026
Description: Event details and schedule
View Race Details View on Map
The Prospect Park Half Marathon 2026!
Organization: Trimara Inc.
Date of Race: 09-20-2026
Description: The Race Guys decided that Prospect Park ...
View Race Details View on Map
10K - 10K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 06-21-2026
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
5K - 5K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 06-21-2026
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
OCT 11 - 10K - 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 ...
View Race Details View on Map
5K - 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 ...
View Race Details View on Map
10K - SEP 26 - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 09-26-2026
Description: The seldom seen
View Race Details View on Map
10K - Oct 4 - 10k
Organization: Du City Tri Runs, Inc.
Date of Race: 10-04-2026
Description: The JC Green Half Marathon, 10K, 5K ...
View Race Details View on Map
VIRTUAL ONLY - HALF - Individual Age group/open
Organization: Du City Tri Runs, Inc.
Date of Race: 09-13-2026
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
5K-SEP 13 - 5K Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 09-13-2026
Description: This course takes you through the natural beauty of ...
View Race Details View on Map
10K - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-16-2026
Description: We are proud and excited to hold the First ...
View Race Details View on Map
5K - Individual
Organization: Du City Tri Runs, Inc.
Date of Race: 08-16-2026
Description: We are proud and excited to hold the First ...
View Race Details View on Map
Complete list of running events in and near Mountainside, NJ: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Mountainside
About Mountainside
Mountainside (NJ) is a borough in Union County with an estimated population of 6,685.[4]
Races Local Newsletter
Subscribe to get the latest on racing delivered to your inbox, once per week.
Did you know?
There were at least 768 marathons scheduled in the United States and Canada in 2016.
