10K races in California, United States — 2026 running calendar

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

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

Avenue of the Giants Marathon

Arcata, California, United States

$60.00 - $100.00

Running

Marathon Half-Marathon 10K

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

08

Grizzly Peak Trail Run

Berkeley, California, United States

Free - $90.00

Trail running Running

10K Half-Marathon 30K Marathon +3

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

May

15

La Jolla Half Marathon, 10K, & 5K

La Jolla, California, United States

$59.00 - $139.00

Running

Half-Marathon 10K 5K

May

15

Luc's Run

Tuolumne, California, United States

$22.00 - $40.00

Running

10K 3.2K 1K Half-Marathon +3

May

15

Nurses Rock Run/Walk

San Dimas, California, United States

$40.00 - $55.00

Running

5K 10K 15K +1

May

15

Wildcat

El Sobrante, California, United States

$45.00 - $90.00

Running

Half-Marathon 10.4K 5K