Ultra races in California, United States — 2026 running calendar

Shadow of the Giants 50k & 20k Run

Fish Camp, California, United States

06 Jun, 2026 (Sat)

Running

Ultra 20K

Huntington Lake Triathlon, 5k & 10k

Lakeshore, California, United States

20 Jun, 2026 (Sat)

$50.00 - $240.00

Triathlon, Duathlon, Aquabike, Swimrun, Running

22.9K 48K 27.5K 17.5K +8

Run Fast… or Pretend Like You Are (100 Mile relay & Challenge)

Auburn, California, United States

20 Jun, 2026 (Sat)

$35.00

Running

1.6K Ultra

Golden State Trail Run

East Garrison, California, United States

20 Jun, 2026 (Sat)

Running

49.9K 36.9K Half-Marathon 10.3K

6th Annual Viva Frida 50 Mile Challenge

Livermore, California, United States

01 Jul, 2026 (Wed) – 31 Jul, 2026

$30.00 - $50.00

Running

Ultra

San Lorenzo River Trail Run

Santa Cruz, California, United States

11 Jul, 2026 (Sat)

Free - $90.00

Trail running, Running

10.1K Half-Marathon 30K Marathon +3

Tri Santa Cruz

Santa Cruz, California, United States

09 Aug, 2026 (Sun)

$90.00

Swimming, Running

1.5K Ultra 5K

Redwood (Summer) Trail Run

Oakland, California, United States

15 Aug, 2026 (Sat)

Free - $90.00

Trail running, Running

8K Half-Marathon 30K Marathon +2

Santa Barbara Triathlon & Beach Festival

Santa Barbara, California, United States

29 Aug, 2026 (Sat)

$50.00

Running, Swimming

5K 1.6K Ultra

SPASM Crystal Springs Trail Run

Woodside, California, United States

29 Aug, 2026 (Sat)

Free - $90.00

Trail running, Running

10K Half-Marathon 35.4K Marathon +2

Kids Walk

Loma Linda, California, United States

01 Sep, 2026 (Tue) – 30 Sep, 2026

Free - $15.00

Running, Walking

1.6K Ultra +1

Diablo Trail Run

Clayton, California, United States

06 Sep, 2026 (Sun)

Free - $90.00

Trail running, Running

6.4K 16.1K Half-Marathon Marathon +2