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

The Retro Run – 5K, 10k, 10m, and Half Marathon

Long Beach, California, United States

Sep 27, 2026 (Sun)

$24.50 - $38.50

Running

5K 10K 16.1K Half-Marathon

Take Me to Your Pizza : Alien Dash 5K. 10K. Half Marathon Sponsored by Domino's Pizza

Long Beach, California, United States

Sep 27, 2026 (Sun)

$30.00 - $62.99

Running

5K 10K Half-Marathon 1.6K

Sgrail Marin - Triathlon & Trail Half Marathon

San Rafael, California, United States

Oct 2, 2026 (Fri) – Oct 4, 2026

Free - $315.00

Triathlon, Running, Trail running

Kids "Fun" Event Ultra Half-Marathon +1

Mean Girls 5K, 10K & Half Marathon

Canoga Park, California, United States

Oct 3, 2026 (Sat)

$34.99

Running

5K 10K Half-Marathon

Auburn Half Marathon

Auburn, California, United States

Oct 3, 2026 (Sat)

Running

21.9K 12.2K 5.5K Half-Marathon

Napa Half Marathon

Napa, California, United States

Oct 4, 2026 (Sun)

Running

Half-Marathon 10.5K

Judgment Day Half Marathon, 10K & 5K Run/Walk

Bakersfield, California, United States

Oct 4, 2026 (Sun)

$50.00 - $80.00

Running

Half-Marathon 10K 5K

Hallo-Thanks-Mas Dash – 5K, 10K, and Half Marathon

San Diego, California, United States

Oct 4, 2026 (Sun)

$28.50 - $42.50

Running

5K 10K Half-Marathon

Peace Officer Memorial Run

Modesto, California, United States

Oct 4, 2026 (Sun)

Free - $120.00

Running

Half-Marathon 5K 1K +3

Redding Breakfast Lions Turtle Bay Run 2026

Redding, California, United States

Oct 4, 2026 (Sun)

$25.00 - $65.00

Running

Half-Marathon 10K 3.2K

Coffee Lovers Run 5K/10K/13.1 SAN FRANCISCO

San Francisco, California, United States

Oct 10, 2026 (Sat) – Nov 28, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Coffee Lovers Run 5K/10K/13.1 SAN DIEGO

San Diego, California, United States

Oct 10, 2026 (Sat) – Nov 28, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8