5K races in California, United States — 2026 running calendar

Apr

24

Nail the Rail Half Marathon, 10K & 5K

Shasta Lake, California, United States

$29.00 - $69.00

Running

Half-Marathon 10K 5K

Apr

25

Orange County Multisport Festival

Mission Viejo, California, United States

$45.00 - $250.00

Triathlon Aquabike Running

Ultra 5K

May

01

Run, Fiesta, Repeat - Cinco de Mayo 5K, 10K, & Half Marathon

Long Beach, California, United States

$24.99 - $44.99

Running

5K 10K Half-Marathon

May

01

The Hoag OC Marathon Running Festival

Costa Mesa, California, United States

Free - $184.00

Running

5K Half-Marathon Marathon Charity Half Marathon +15

May

01

Kerman Almond Festival Scholarship Fun Run/Walk

Kerman, California, United States

$5.00 - $25.00

Running Walking

5K 0.8K 0.4K 0.2K +1

May

02

Cal Tri Ventura - 5.2.27

Ventura, California, United States

$28.86 - $500.00

Triathlon Duathlon Aquabike Swimrun Swimming Running

Sprint Triathlon Ultra Sprint RunBikeRun (5km run, 22km bike, 5km run) Sprint SwimBike +9

May

02

Spring Sprint Triathlon & San Diego Tri Series 5K

San Diego, California, United States

$34.00 - $261.00

Triathlon Duathlon Aquabike Running

Triathlon-International Triathlon-Sprint 5K Aquabike (Swim/Bike) - Sprint +7

May

02

May the be with You- The Empire Strides Back 5K, 10K, & Half Marathon by Califlow Runs

Long Beach, California, United States

$18.00 - $64.99

Running

5K 10K Half-Marathon 1.6K +1

May

08

Beer City Half™ Sacramento

Sacramento, California, United States

$25.00 - $87.50

Running

Half-Marathon 10K 5K 1.6K +2

May

09

Trailquake

Saratoga, California, United States

$45.00 - $90.00

Running

Half-Marathon 10.8K 5.1K

May

09

Mother's Day Run & Walk

Watsonville, California, United States

$20.00 - $30.00

Running

1K 5K 10K

May

09

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

Long Beach, California, United States

$15.00 - $56.99

Running

5K 10K Half-Marathon 1.6K +4