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

Lafayette Res Run for Education

Lafayette, California, United States

10 Oct, 2026 (Sat) – 18 Oct, 2026

$30.00

Running

3.9K 5K 10K 3.2K

Bizz Johnson

Susanville, California, United States

11 Oct, 2026 (Sun)

$65.00 - $100.00

Running

Ultra Half-Marathon 10K

Montebello Heritage 5K/10K

Montebello, California, United States

11 Oct, 2026 (Sun)

$30.00

Running

10K 5K

Champion Mine Trail Race

Nevada City, California, United States

11 Oct, 2026 (Sun)

$35.00 - $65.00

Running

Half-Marathon 10K 5K

Springville Apple Run

Springville, California, United States

17 Oct, 2026 (Sat)

$15.00 - $40.00

Running, Walking

5K 10K 3.2K 1K

Back to the Future: 88 MPH Dash 5K, 10K & Half

Canoga Park, California, United States

17 Oct, 2026 (Sat)

$34.99

Running

5K 10K Half-Marathon

Lake Hodges Trail Festival

San Diego, California, United States

17 Oct, 2026 (Sat) – 18 Oct, 2026

$15.00 - $130.00

Trail running, Running, Duathlon

50K 25.1K 15K 10.3K +7

Witches Wave - Halloween Run 5K, 10K, and Half Marathon by Califlow Runs

Huntington Beach, California, United States

18 Oct, 2026 (Sun)

$38.99 - $48.99

Running

5K 10K Half-Marathon

2026 Cal Tri LA - 10.18.26

Playa Del Rey, California, United States

18 Oct, 2026 (Sun)

Free - $153.86

Triathlon, Running, Swimming

Ultra 5K 1.5K 10K +1

MISSION INN RUN

Riverside, California, United States

18 Oct, 2026 (Sun)

$25.00 - $85.00

Running, Walking

5K 10K Half-Marathon 2K +4

Lake Evans Triathlon, 5k & 10k

Bakersfield, California, United States

18 Oct, 2026 (Sun)

$45.00 - $230.00

Triathlon, Aquabike, Swimrun, Duathlon, Running

23.7K 48.4K 18.7K 5.3K +12

Big Sur River Run

Big Sur, California, United States

24 Oct, 2026 (Sat)

$20.00 - $60.00

Running

5K 10K