Running races in or near Lake Forest, CA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Lake Forest, 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: University High School PTSA
Date of Race: 02-07-2026
Description: 2026 Trojan Trot 5K Fun Run! Early Bird! ...
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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 Monster ...
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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 Monster ...
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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 Monster ...
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Running-5K (Women's) - Individual Age group/open
Organization: Corona del Mar Chamber of Commerce
Date of Race: 06-07-2025
Description: OCEAN VIEW COURSE ...
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Running-5K (Men's) - Individual ...
Organization: Corona del Mar Chamber of Commerce
Date of Race: 06-07-2025
Description: OCEAN VIEW COURSE ...
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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 Monster ...
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Super Kid - 5K - Kids 13 years ...
Organization: Triumph Foundation
Date of Race: 09-13-2025
Description: We're coming BACK for a 3rd round of fun! Our annual ...
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Monster Dash 5k, 10k, 15k, Half Marathon YL
Organization: ABWR
Date of Race: 10-26-2025
Description: Come on out and join us for our Monster ...
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Run-Walk-Skip 1M Fun Run - Run-Walk-Skip Fun Run: ...
Organization: University High School PTSA
Date of Race: 02-07-2026
Description: 2026 Trojan Trot 5K Fun Run! Early Bird! ...
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Bubble Run - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 11-15-2025
Description: If you’ve done a traditional 5K, you know ...
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Team Registration - Team Registration
Organization: Triumph Foundation
Date of Race: 09-13-2025
Description: We're coming BACK for a 3rd round of fun! Our annual ...
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Rolling-5K Wheelchair - Individual Age group/open
Organization: Triumph Foundation
Date of Race: 09-13-2025
Description: We're coming BACK for a 3rd round of fun! Our annual ...
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Running or Walking-5K - Individual Age group/open
Organization: Triumph Foundation
Date of Race: 09-13-2025
Description: We're coming BACK for a 3rd round of fun! Our annual ...
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University HS Student/Staff: Running-5K - University HS Student/Staff: ...
Organization: University High School PTSA
Date of Race: 02-07-2026
Description: 2026 Trojan Trot 5K Fun Run! Early Bird! ...
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Muddy Dash - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 06-21-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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Superheroes Triumph! 5K OC 2025
Organization: Triumph Foundation
Date of Race: 09-13-2025
Description: We're coming BACK for a 3rd round of fun! Our annual ...
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2026 Trojan Trot 5K & 1M Fun Run
Organization: University High School PTSA
Date of Race: 02-07-2026
Description: 2026 Trojan Trot 5K Fun Run! Early Bird! ...
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Super Kid - 5K Runner - Individual Age ...
Organization: Triumph Foundation
Date of Race: 09-13-2025
Description: We're coming BACK for a 3rd round of fun! Our annual ...
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1K Open Run - Individual Age group/open
Organization: SJC Community Run
Date of Race: 05-31-2025
Description: This will ...
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3K Open Run - Individual Age group/open
Organization: SJC Community Run
Date of Race: 05-31-2025
Description: This will ...
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Muddy Dash - Value Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶7̶4.9̶5̶
Organization: Viral Run
Date of Race: 06-21-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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5K Open Run - Individual Age group/open
Organization: SJC Community Run
Date of Race: 05-31-2025
Description: This will ...
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Bubble Run - Value Registrations- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶5̶4̶.̶9̶5̶
Organization: Viral Run
Date of Race: 11-15-2025
Description: If you’ve done a traditional 5K, you know ...
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Muddy Dash | Lake Elsinore
Organization: Viral Run
Date of Race: 06-21-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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Complete list of running events in and near Lake Forest, CA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Lake Forest
About Lake Forest
Lake Forest (CA) is a city in Orange County with an estimated population of 77,264.[4]
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Did you know?
The number of U.S. marathon finishers declined from 2014 to 2015 approximately 8 percent.
