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-5K - Individual Age group/open
Organization: Okoye Foundation
Date of Race: 01-25-2025
Description: The Ontario Mills 5k, Run/ Walk, benefits athletic programs and children’s ...
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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 ...
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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 ...
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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 ...
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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 ...
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Bubble Run - VIP Registration
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
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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 ...
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Bubble Run - Value Registrations
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
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Bubble Run - Standard Registration
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
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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 ...
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Bubble Run | Irvine | November 8th
Organization: Viral Run
Date of Race: 11-08-2025
Description: If you’ve done a traditional 5K, you know ...
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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 ...
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Bubble Run - Value Registrations
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
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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 ...
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Ontario 5k Run/Walk
Organization: Okoye Foundation
Date of Race: 01-25-2025
Description: The Ontario Mills 5k, Run/ Walk, benefits athletic programs and children’s ...
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Tacos N' Beer 5k--May 3, 2025
Organization: Runcarrera TEAM
Date of Race: 05-03-2025
Description: A 5k run like no other! Tacos ...
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Bubble Run - VIP Registration
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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]
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Did you know?
The number of U.S. marathon finishers declined from 2014 to 2015 approximately 8 percent.
