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: 12-21-2025
Description: It's time for our Reindeer Run 5k, 10k, 15k, ...
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Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 12-21-2025
Description: It's time for our Reindeer Run 5k, 10k, 15k, ...
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Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 12-21-2025
Description: It's time for our Reindeer Run 5k, 10k, 15k, ...
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Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 10-12-2025
Description: It's time for our Runacopia 5k, 10k, 15k, Half ...
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Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 10-12-2025
Description: It's time for our Runacopia 5k, 10k, 15k, Half ...
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Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 10-12-2025
Description: It's time for our Runacopia 5k, 10k, 15k, Half ...
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Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 09-07-2025
Description: It's time for our Hot to Trot 5k, 10k, ...
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Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 09-07-2025
Description: It's time for our Hot to Trot 5k, 10k, ...
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Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 09-07-2025
Description: It's time for our Hot to Trot 5k, 10k, ...
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Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 10-26-2025
Description: Come on out and join us for our Halloween ...
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Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 10-26-2025
Description: Come on out and join us for our Halloween ...
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Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 10-26-2025
Description: Come on out and join us for our Halloween ...
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Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 12-21-2025
Description: It's time for our Reindeer Run 5k, 10k, 15k, ...
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Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 10-12-2025
Description: It's time for our Runacopia 5k, 10k, 15k, Half ...
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Running-Half marathon - Individual Age group/open
Organization: ABWR
Date of Race: 10-26-2025
Description: Come on out and join us for our Halloween ...
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Running-Half Marathon - Individual Age group/open
Organization: ABWR
Date of Race: 09-07-2025
Description: It's time for our Hot to Trot 5k, 10k, ...
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Bubble Run - Exclusive VIP Registration- Regular Price ...
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 - Exclusive VIP Registration- Regular Price ...
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
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Bubble Run - Value Registrations- Regular Price $54.95
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
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Hot to Trot 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 09-07-2025
Description: It's time for our Hot to Trot 5k, 10k, ...
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Reindeer Run 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 12-21-2025
Description: It's time for our Reindeer Run 5k, 10k, 15k, ...
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Halloween Hustle 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 10-26-2025
Description: Come on out and join us for our Halloween ...
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Bubble Run | Pomona
Organization: Viral Run
Date of Race: 07-19-2025
Description: If you’ve done a traditional 5K, you know they ...
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Runacopia 5k, 10k, 15k, Half Marathon
Organization: ABWR
Date of Race: 10-12-2025
Description: It's time for our Runacopia 5k, 10k, 15k, Half ...
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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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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?
Historically, more marathons are run in the month of October than any other month (in the U.S.).
