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Races in Lake Forest, CA

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.

Fleet Feet Sports

Running-5K - Individual Age group/open

Organization: ABWR

Date of Race: 04-20-2025

Description: It's time for our Happy Easter 5k, 10k, 15k, ...

Running-10K - Individual Age group/open

Organization: ABWR

Date of Race: 04-20-2025

Description: It's time for our Happy Easter 5k, 10k, 15k, ...

Running-10K - Individual Age group/open

Organization: ABWR

Date of Race: 10-26-2025

Description: Come on out and join us for our Halloween ...

Running-15K - Individual Age group/open

Organization: ABWR

Date of Race: 10-26-2025

Description: Come on out and join us for our Halloween ...

Running-5K - Individual Age group/open

Organization: Forever Young and Fit LLC

Date of Race: 04-12-2025

Description: 🔥 2nd Annual 5K Beach Run Challenge – Are You Ready?🔥 ...

Running-15K - Individual Age group/open

Organization: ABWR

Date of Race: 04-20-2025

Description: It's time for our Happy Easter 5k, 10k, 15k, ...

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! ...

Running-5K - Individual Age group/open

Organization: ABWR

Date of Race: 10-26-2025

Description: Come on out and join us for our Halloween ...

Running-5K (Women's) - Individual Age group/open

Organization: Corona del Mar Chamber of Commerce

Date of Race: 06-07-2025

Description: Corona del Mar ...

Running-Half Marathon - Individual Age group/open

Organization: ABWR

Date of Race: 04-20-2025

Description: It's time for our Happy Easter 5k, 10k, 15k, ...

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 ...

Running-5K (Men's) - Individual ...

Organization: Corona del Mar Chamber of Commerce

Date of Race: 06-07-2025

Description: Corona del Mar ...

Muddy Dash - Exclusive VIP Registration- Regular Price ...

Organization: Viral Run

Date of Race: 06-21-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

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 ...

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! ...

5K BEACH RUN CHALLENGE 2.0

Organization: Forever Young and Fit LLC

Date of Race: 04-12-2025

Description: 🔥 2nd Annual 5K Beach Run Challenge – Are You Ready?🔥 ...

Happy Easter 5k, 10k, 15k, Half Marathon

Organization: ABWR

Date of Race: 04-20-2025

Description: It's time for our Happy Easter 5k, 10k, 15k, ...

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 ...

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 ...

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! ...

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 ...

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 ...

1K Open Run - Individual Age group/open

Organization: SJC Community Run

Date of Race: 05-17-2025

Description: This will ...

5K Open Run - Individual Age group/open

Organization: SJC Community Run

Date of Race: 05-17-2025

Description: This will ...

Muddy Dash - Value Registration- Regular Price $74.95

Organization: Viral Run

Date of Race: 06-21-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

Fleet Feet Sports

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?

There were at least 768 marathons scheduled in the United States and Canada in 2016.

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