Half-Marathon races in California, United States — 2026 running calendar

Oct

11

Champion Mine Trail Race

Nevada City, California, United States

$35.00 - $65.00

Running

Half-Marathon 10K 5K

Oct

11

Fredrick Michael Gibson 5K/10K & Half Marathon Walk/Run for Depression Awareness

Simi Valley, California, United States

Running

Half-Marathon 10K 5K 1K +2

Oct

11

2026 Humboldt Redwoods Marathon, Half Marathon, 5K

Weott, California, United States

$60.00 - $145.00

Running

Half-Marathon 5K Marathon

Oct

17

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

Canoga Park, California, United States

$34.99

Running

5K 10K Half-Marathon

Oct

17

Night of the Living Runners – 5K, 10K, 10-Miler, Half Marathon

Long Beach, California, United States

$24.50 - $38.50

Running

5K 10K 16.1K Half-Marathon

Oct

18

2026 - City to the Sea Half Marathon & 5K

San Luis Obispo, California, United States

$60.00 - $125.00

Running

Half-Marathon 5K

Oct

18

MISSION INN RUN

Riverside, California, United States

$25.00 - $95.00

Running Walking

5K 10K Half-Marathon 2K +4

Oct

18

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

Huntington Beach, California, United States

$38.99 - $48.99

Running

5K 10K Half-Marathon

Oct

24

RunThrough USA Long Beach 5k,10k & Half Marathon Race

Long Beach, California, United States

$42.00 - $57.75

Running

5K 10K Half-Marathon

Oct

24

Malibu Moves: Half Marathon, 10K, 5K, 1-Mi & 1K

Malibu, California, United States

Free - $184.00

Running

10K 5K 1K Half-Marathon +8

Oct

24

DIA DE LOS MUERTOS HALF MARATHON & 5K RUN/WALK (BAKERSFIELD)

Bakersfield, California, United States

$50.00 - $93.00

Running Walking

Half-Marathon 5K 3.2K

Oct

25

Trick or Trot 5K, 10K, and Half Marathon by Califlow Runs

Long Beach, California, United States

$38.99 - $48.99

Running

5K 10K Half-Marathon