| 571 | 31 Oct 26 | Happy Halloween Half Marathon | 5K/10K/15K/13.1M | Long Beach, CA |
| 572 | 31 Oct 26 | Dia De Los Muertos 5K Race | 5K | Sacramento, CA |
| 573 | 31 Oct 26 | Dia de los Muertos Run | 5K/10K | San Jose, CA |
| 574 | 31 Oct 26 | Anaheim Community Foundation Dia De Los Muertos 5K | 5K | Anaheim, CA |
| 575 | 31 Oct 26 | Halloween Trick or Trot Run 5K/10K/13.1 SAN FRANCISCO | 1M/5K/10K/13.1M | San Francisco, CA |
| 576 | 31 Oct 26 | Halloween Trick or Trot Run 5K/10K/13.1 SAN DIEGO | 1M/5K/10K/13.1M | San Diego, CA |
| 577 | 01 Nov 26 | Griffith Park Trail Races | 10K/13.1/30K/26.2/50K | Los Angeles, CA |
| 578 | 01 Nov 26 | Viva la Vida - Day of the Dead 5K, 10K, and Half Marathon | 5K/10K/13.1M | Long Beach, CA |
| 579 | 01 Nov 26 | Morro Bay Triathlon | Olympic/Sprint Triathlon | Morro Bay, CA |
| 580 | 01 Nov 26 | Luz y Vida Half Marathon | 5K/10K/15K/13.1M | Riverside, CA |
| 581 | 01 Nov 26 | Golden Gate Half Marathon | 5K/13.1M | San Francisco, CA |
| 582 | 01 Nov 26 | Dino Dash | 2K/5K/10K | Tustin, CA |
| 583 | 01 Nov 26 | Cal Tri Newport Dunes | 5K/10K | Newport Beach, CA |
| 584 | 01 Nov 26 | Almond Bowl | 5K/10K | Chico, CA |
| 585 | 01 Nov 26 | 5K Oakland Tech Fundraiser Race | 1M/5K | Oakland, CA |