Running races in or near Diamond Bar, CA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Diamond Bar, 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.
Instride Running
Organization: City of Downey
Date of Race: 01-05-2026
Description: DescriptionInstride Running Club is a youth group that trains for track, ...
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Instride Running
Organization: City of Downey
Date of Race: 01-05-2026
Description: DescriptionInstride Running Club is a youth group that trains for track, ...
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Instride Running
Organization: City of Downey
Date of Race: 01-05-2026
Description: DescriptionInstride Running Club is a youth group that trains for track, ...
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Running-5K - Individual Age group/open
Organization: ABWR
Date of Race: 03-22-2026
Description: Come on out and join us for the Spring Equinox 5k, ...
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Running-10K - Individual Age group/open
Organization: ABWR
Date of Race: 03-22-2026
Description: Come on out and join us for the Spring Equinox 5k, ...
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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: 01-04-2026
Description: It's time to Ring in the New Year 5k, 10k, 15k, ...
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Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 01-04-2026
Description: It's time to Ring in the New Year 5k, 10k, 15k, ...
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Running-15K - Individual Age group/open
Organization: ABWR
Date of Race: 03-22-2026
Description: Come on out and join us for the Spring Equinox 5k, ...
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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-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-10K - Individual Age group/open
Organization: ABWR
Date of Race: 01-04-2026
Description: It's time to Ring in the New Year 5k, 10k, 15k, ...
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Running-Half marathon - Individual Age group/open
Organization: ABWR
Date of Race: 03-22-2026
Description: Come on out and join us for the Spring Equinox 5k, ...
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Bubble Run - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 10-10-2026
Description: If you’ve done a traditional 5K, you know they ...
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Run 60
Organization: City of Downey
Date of Race: 01-05-2026
Description: DescriptionPerfect for youth ages 7–17 with some experience in competitive running ...
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Bubble Run - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 08-29-2026
Description: If you’ve done a traditional 5K, you know they ...
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Blacklight Run - Value Registrations- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶5̶4̶.̶9̶5̶
Organization: Viral Run
Date of Race: 08-29-2026
Description: The Blacklight Run™ is none other than the brightest, most fun ...
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Blacklight Run - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 08-29-2026
Description: The Blacklight Run™ is none other than the brightest, most fun ...
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Terrain Race - Value Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶7̶4.9̶5̶
Organization: Viral Run
Date of Race: 11-21-2026
Description: Jump, climb, roll, and crawl your way through this one-of-a-kind obstacle ...
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Run 60
Organization: City of Downey
Date of Race: 01-05-2026
Description: DescriptionPerfect for youth ages 7–17 with some experience in competitive running ...
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Run 100
Organization: City of Downey
Date of Race: 01-05-2026
Description: DescriptionDesigned for committed youth runners ages 7–17 who want to train ...
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Session 2
Organization: City of Downey
Date of Race: 02-02-2026
Description: DescriptionPerfect for youth ages 7–17 with some experience in competitive running ...
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Session 2
Organization: City of Downey
Date of Race: 02-02-2026
Description: DescriptionPerfect for youth ages 7–17 with some experience in competitive running ...
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Session 3
Organization: City of Downey
Date of Race: 03-02-2026
Description: DescriptionPerfect for youth ages 7–17 with some experience in competitive running ...
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Terrain Race | Irvine 2026
Organization: Viral Run
Date of Race: 11-21-2026
Description: Jump, climb, roll, and crawl your way through this one-of-a-kind obstacle ...
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Complete list of running events in and near Diamond Bar, CA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Diamond Bar
About Diamond Bar
Diamond Bar (CA) is a city in Los Angeles County with an estimated population of 55,544.[4]
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In 2015, the 5K maintained the #1 position of all race distances with 7.6 million finishers (U.S.).
