Upcoming Races Near Ontario, CA in May, 2026

Name: Once in a Blue Moon 5K. 10K. Half Marathon by Califlow Runs
Start: 2026-05-31
End: 2026-05-31
Location: Long Beach

The Rebel Run – 5K, 10K, 10M, and Half Marathon

Long Beach, CA

Saturday, May 2nd, 2026

Featured

10K

Half

View details for race The Rebel Run – 5K, 10K, 10M, and Half Marathon

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NURSES ROCK Run/Walk

San Dimas, CA

Saturday, May 2nd, 2026

10K

15K

View details for race NURSES ROCK Run/Walk

Nurses Rock

San Dimas, CA

Saturday, May 2nd, 2026

10K

View details for race Nurses Rock

ARMC 5K

Colton, CA

Saturday, May 2nd, 2026

View details for race ARMC 5K

Hoag Kids Run The OC

Costa Mesa, CA

Saturday, May 2nd, 2026

1 Mile

View details for race Hoag Kids Run The OC

The Hoag OC Marathon Running Festival

Costa Mesa, CA

Saturday, May 2nd, 2026

Half

Marathon

View details for race The Hoag OC Marathon Running Festival

Project Youth OC - 2025 OC Marathon

Costa Mesa, CA

Saturday, May 2nd, 2026

View details for race Project Youth OC - 2025 OC Marathon

The 2026 Hoag OC Marathon Running Festival (Exp...

Costa Mesa, CA

Saturday, May 2nd, 2026

Half

Marathon

View details for race The 2026 Hoag OC Marathon Running Festival (Expo Registration)

Finish The Ride and Finish The Run Griffith Park

Los Angeles, CA

Saturday, May 2nd, 2026

10K

15K

View details for race Finish The Ride and Finish The Run Griffith Park

SoCal's Cinco De Miles 5K and 5 MILE

Huntington Beach, CA

Saturday, May 2nd, 2026

1 Mile

View details for race SoCal's Cinco De Miles 5K and 5 MILE

May the 4th be with You- The Empire Strides Bac...

Long Beach, CA

Sunday, May 3rd, 2026

10K

Half

View details for race May the 4th be with You- The Empire Strides Back 5K, 10K, & Half Marathon by Califlow Runs

SRLA Victory 5K

Los Angeles, CA

Sunday, May 3rd, 2026

View details for race SRLA Victory 5K

Verdugo Mountains 10K Trail Run & Hike

Glendale, CA

Sunday, May 3rd, 2026

10K

Trail

View details for race Verdugo Mountains 10K Trail Run & Hike

Santa Fe Springs Totally 80's 5K Fun Run/Walk

Santa Fe Springs, CA

Saturday, May 9th, 2026

View details for race Santa Fe Springs Totally 80's 5K Fun Run/Walk

Lynwood 5K/10K Run

Lynwood, CA

Saturday, May 9th, 2026

10K

View details for race Lynwood 5K/10K Run

NIGHT NATION RUN - ORANGE COUNTY

Costa Mesa, CA

Saturday, May 9th, 2026

View details for race NIGHT NATION RUN - ORANGE COUNTY

WALKUNITEDLA 2026

Inglewood, CA

Saturday, May 9th, 2026

View details for race WALKUNITEDLA 2026

Irvine Dream Run

Irvine, CA

Saturday, May 9th, 2026

View details for race Irvine Dream Run

Happy Mothers Day 5k, 10k, 15k, Half Marathon

Long beach, CA

Saturday, May 9th, 2026

10K

Half

15K

View details for race Happy Mothers Day 5k, 10k, 15k, Half Marathon

Footsteps for Families

Palmdale, CA

Saturday, May 9th, 2026

View details for race Footsteps for Families

Long Beach Mother's Day Bloom & Zoom 5K, 10K, H...

Long Beach, CA

Sunday, May 10th, 2026

10K

Half

View details for race Long Beach Mother's Day Bloom & Zoom 5K, 10K, Half Marathon by Califlow Runs

Run for the Rose – 5K, 10K, 10M, and Half Marathon

Long Beach, CA

Sunday, May 10th, 2026

10K

15K

View details for race Run for the Rose – 5K, 10K, 10M, and Half Marathon

MVRRC 7th Annual Mother's Day 5K fun Run event

Perris, CA

Sunday, May 10th, 2026

1 Mile

View details for race MVRRC 7th Annual Mother's Day 5K fun Run event

Villa Park 5K

Villa Park, CA

Saturday, May 16th, 2026

View details for race Villa Park 5K

Canyon City Classic

Azusa, CA

Saturday, May 16th, 2026

10K

View details for race Canyon City Classic

Breezin’ Through Beaumont

Beaumont, CA

Saturday, May 16th, 2026

View details for race Breezin’ Through Beaumont

Sweet Life Run 5K. 10K. Half Marathon by Califl...

Long Beach, CA

Saturday, May 16th, 2026

10K

Half

View details for race Sweet Life Run 5K. 10K. Half Marathon by Califlow Runs

KID-FIT Family Fun Run 5K & 1K - All Ages

South El Monte, CA

Saturday, May 16th, 2026

Trail

View details for race KID-FIT Family Fun Run 5K & 1K - All Ages

Wild West Fun Run Series

Temecula, CA

Saturday, May 16th, 2026

View details for race Wild West Fun Run Series

Hobby Joggers

Temecula, CA

Saturday, May 16th, 2026

1 Mile

View details for race Hobby Joggers

Great Donut Run / Walk 5k

Irvine, CA

Sunday, May 17th, 2026

1 Mile

Fast

View details for race Great Donut Run / Walk 5k

Beach Dash 5k, 10k, 15k, Half Marathon

Long beach, CA

Sunday, May 17th, 2026

Half

15K

View details for race Beach Dash 5k, 10k, 15k, Half Marathon

Whittier Narrows Spring Running Festival

South El Monte, CA

Sunday, May 17th, 2026

10K

15K

View details for race Whittier Narrows Spring Running Festival

Mount Wilson Trail Race 2026

Sierra Madre, CA

Saturday, May 23rd, 2026

View details for race Mount Wilson Trail Race 2026

Strawberry Stomp 5K

Garden Grove, CA

Saturday, May 23rd, 2026

View details for race Strawberry Stomp 5K

Run to Remember 5k, 10k, 15k, Half Marathon

Long beach, CA

Saturday, May 23rd, 2026

15K

Half

View details for race Run to Remember 5k, 10k, 15k, Half Marathon

Exposition Race of Legends 5K Run

Los Angeles, CA

Sunday, May 24th, 2026

View details for race Exposition Race of Legends 5K Run

43rd Annual Providence Saint John's Health Cent...

Los Angeles, CA

Sunday, May 24th, 2026

10K

Fast

View details for race 43rd Annual Providence Saint John's Health Center Brentwood Run

Memorial 5K Run

Big Bear Lake, CA

Sunday, May 24th, 2026

View details for race Memorial 5K Run

2026 Foothills Strong Run

La Canada Flintridge, CA

Monday, May 25th, 2026

1 Mile

View details for race 2026 Foothills Strong Run

Memorial Day 5k, 10k, 15k, Half Marathon

Long beach, CA

Monday, May 25th, 2026

15K

Half

View details for race Memorial Day 5k, 10k, 15k, Half Marathon

Glendora Memorial Day 5K

Glendora, CA

Monday, May 25th, 2026

View details for race Glendora Memorial Day 5K

Memorial Day 5K, 10K & Kids 1 Mile Run/Walk

Hemet, CA

Monday, May 25th, 2026

10K

1 Mile

Fast

View details for race Memorial Day 5K, 10K & Kids 1 Mile Run/Walk

Laguna Hills Memorial Day Half Marathon, 5K & 10K

Laguna Hills, CA

Monday, May 25th, 2026

Half

10K

View details for race Laguna Hills Memorial Day Half Marathon, 5K & 10K

Hills Are Alive Run/Walk

Rolling Hills Estates, CA

Saturday, May 30th, 2026

10K

Trail

View details for race Hills Are Alive Run/Walk

Run into Summer Vibes 5K, 10K, & Half Marathon

Venice Beach, CA

Saturday, May 30th, 2026

10K

1 Mile

View details for race Run into Summer Vibes 5K, 10K, & Half Marathon

Cerritos 5K Run/Walk Celebrate in Stride Moo-ve...

Cerritos, CA

Saturday, May 30th, 2026

View details for race Cerritos 5K Run/Walk Celebrate in Stride Moo-ve with the Herd

Race for Education

Paramount, CA

Saturday, May 30th, 2026

View details for race Race for Education

7th Annual SJC Community Run

San Juan Capistrano, CA

Saturday, May 30th, 2026

View details for race 7th Annual SJC Community Run

Once in a Blue Moon 5K. 10K. Half Marathon by C...

Long Beach, CA

Sunday, May 31st, 2026

10K

Half

View details for race Once in a Blue Moon 5K. 10K. Half Marathon by Califlow Runs

Explore more in Ontario, CA

Distances:

5K 10K Half Marathon Marathon

Months:

March April May

Tags:

Trail Boston Qualifiers Fast Courses

State:

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