Running races in or near Ontario, CA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Ontario, CA 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-10K - Individual Age group/open
Organization: ABWR
Date of Race: 12-31-2026
Description: Celebrate New Year's Eve at the New Year's Eve ...
View Race Details View on Map
Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 11-01-2026
Description: Welcome to the Luz y Vida 5k, 10k, 15k, ...
View Race Details View on Map
Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 11-15-2026
Description: It's time for the Friendsgiving 5k, 10k, 15k, Half Marathon at ...
View Race Details View on Map
Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 12-31-2026
Description: Celebrate New Year's Eve at the New Year's Eve ...
View Race Details View on Map
Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 12-13-2026
Description: It's time for the Reindeer Run 5k, 10k, 15k, ...
View Race Details View on Map
Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 11-01-2026
Description: Welcome to the Luz y Vida 5k, 10k, 15k, ...
View Race Details View on Map
Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 11-15-2026
Description: It's time for the Friendsgiving 5k, 10k, 15k, Half Marathon at ...
View Race Details View on Map
Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 12-13-2026
Description: It's time for the Reindeer Run 5k, 10k, 15k, ...
View Race Details View on Map
Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 11-28-2026
Description: Come on out and join us for the Saturday Turkey Trot ...
View Race Details View on Map
Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 11-28-2026
Description: Come on out and join us for the Saturday Turkey Trot ...
View Race Details View on Map
Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 12-31-2026
Description: Celebrate New Year's Eve at the New Year's Eve ...
View Race Details View on Map
Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 11-28-2026
Description: Come on out and join us for the Saturday Turkey Trot ...
View Race Details View on Map
Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 11-15-2026
Description: It's time for the Friendsgiving 5k, 10k, 15k, Half Marathon at ...
View Race Details View on Map
Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 11-01-2026
Description: Welcome to the Luz y Vida 5k, 10k, 15k, ...
View Race Details View on Map
Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 12-13-2026
Description: It's time for the Reindeer Run 5k, 10k, 15k, ...
View Race Details View on Map
Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 11-01-2026
Description: Welcome to the Luz y Vida 5k, 10k, 15k, ...
View Race Details View on Map
Running-Half marathon - Individual Age group/open
Organization: ABWR
Date of Race: 11-28-2026
Description: Come on out and join us for the Saturday Turkey Trot ...
View Race Details View on Map
Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 11-15-2026
Description: It's time for the Friendsgiving 5k, 10k, 15k, Half Marathon at ...
View Race Details View on Map
Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 12-13-2026
Description: It's time for the Reindeer Run 5k, 10k, 15k, ...
View Race Details View on Map
Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 12-31-2026
Description: Celebrate New Year's Eve at the New Year's Eve ...
View Race Details View on Map
Riverside Mission Inn
Organization: City of Rosemead
Date of Race: 12-19-2026
Description: Celebrate New Year's Eve at the New Year's Eve ...
View Race Details View on Map
New Years Eve 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 12-31-2026
Description: Celebrate New Year's Eve at the New Year's Eve ...
View Race Details View on Map
Luz y Vida 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 11-01-2026
Description: Welcome to the Luz y Vida 5k, 10k, 15k, ...
View Race Details View on Map
Muddy Dash - VALUE REGISTRATION - R̶e̶g̶u̶l̶a̶r̶ ...
Organization: Viral Run
Date of Race: 03-06-2027
Description: Muddy Dash is not your average mud run! Get ready for ...
View Race Details View on Map
Reindeer Run Riverside 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 12-13-2026
Description: It's time for the Reindeer Run 5k, 10k, 15k, ...
View Race Details View on Map
Complete list of running events in and near Ontario, CA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Ontario
About Ontario
Ontario (CA) is a city in San Bernardino County with an estimated population of 163,924.[4]
Races Local Newsletter
Subscribe to get the latest on racing delivered to your inbox, once per week.
Did you know?
In 2015, the 5K maintained the #1 position of all race distances with 7.6 million finishers (U.S.).
