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-15K - Individual Age group/open
Organization: ABWR
Date of Race: 03-30-2025
Description: ABWR has teamed up with two local charities to help with ...
View Race Details View on Map
Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 03-30-2025
Description: ABWR has teamed up with two local charities to help with ...
View Race Details View on Map
Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 03-30-2025
Description: ABWR has teamed up with two local charities to help with ...
View Race Details View on Map
Bubble Run - VIP Registration
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
View Race Details View on Map
Bubble Run | Pomona
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
View Race Details View on Map
La Habra Run 50-Yard Diaper Dash Runners
Organization: City of La Habra Community Services Department
Date of Race: 03-08-2025
Description: DescriptionThe La Habra Races Registration is now closed. You can still ...
View Race Details View on Map
La Habra Run 1K Kiddy Runners
Organization: City of La Habra Community Services Department
Date of Race: 03-08-2025
Description: DescriptionThe La Habra Races Registration is now closed. You can still ...
View Race Details View on Map
La Habra Run 5K Runners
Organization: City of La Habra Community Services Department
Date of Race: 03-08-2025
Description: DescriptionThe La Habra Races Registration is now closed. You can still ...
View Race Details View on Map
Bubble Run - Value Registrations
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
View Race Details View on Map
La Habra Run 1K Kiddy Runners
Organization: City of La Habra Community Services Department
Date of Race: 03-08-2025
Description: DescriptionThe La Habra Races Registration is now closed. You can still ...
View Race Details View on Map
Bubble Run - Standard Registration
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
View Race Details View on Map
Running-Half marathon - Individual Age group/open
Organization: ABWR
Date of Race: 03-30-2025
Description: ABWR has teamed up with two local charities to help with ...
View Race Details View on Map
Bubble Run - VIP Registration
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
View Race Details View on Map
Tacos N Beer 5k--Whittier Narrows Park - Individual ...
Organization: Runcarrera TEAM
Date of Race: 05-03-2025
Description: A 5k run like no other! Tacos ...
View Race Details View on Map
Bubble Run - Standard Registration
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
View Race Details View on Map
Bubble Run - Value Registrations
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
View Race Details View on Map
Tough Mudder Los Angeles 2025
Organization: Tough Mudder US
Date of Race: 04-05-2025
Description: Tough Mudder is more than just an obstacle course. Built on ...
View Race Details View on Map
Phoenix Rising 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 03-30-2025
Description: ABWR has teamed up with two local charities to help with ...
View Race Details View on Map
Bubble Run | Irvine
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
View Race Details View on Map
Tacos N' Beer 5k--May 3, 2025
Organization: Runcarrera TEAM
Date of Race: 05-03-2025
Description: A 5k run like no other! Tacos ...
View Race Details View on Map
2025 Adaptive Sports Fair Registration
Organization: Rancho Cucamonga Community Services
Date of Race: 06-14-2025
Description: DescriptionThe 3rd Annual Adaptive Sports Fair will take place on Saturday, ...
View Race Details View on Map
2025 Wicked Wine Run Irvine, CA
Organization: Wicked Wine Run
Date of Race: 04-19-2025
Description: Whether you’re a seasoned runner or just love to walk and ...
View Race Details View on Map
Sunday - April 6, 2025 - TM 5K ...
Organization: Tough Mudder US
Date of Race: 04-05-2025
Description: Tough Mudder is more than just an obstacle course. Built on ...
View Race Details View on Map
Sunday - April 6, 2025 - Spectator & ...
Organization: Tough Mudder US
Date of Race: 04-05-2025
Description: Tough Mudder is more than just an obstacle course. Built on ...
View Race Details View on Map
Sunday - April 6, 2025 - TM 15K ...
Organization: Tough Mudder US
Date of Race: 04-05-2025
Description: Tough Mudder is more than just an obstacle course. Built on ...
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?
There were at least 768 marathons scheduled in the United States and Canada in 2016.
