| 526 | 23 Oct 26 | 2026 Alpha Win Napa Valley - FALL | triathlon | Napa, CA |
| 527 | 23 Oct 26 | Ragnar Trail SoCal Individual | 3.1M | Warner Springs, CA |
| 528 | 23 Oct 26 | Ragnar Trail SoCal | 120M | Warner Springs, CA |
| 529 | 24 Oct 26 | Haunted Corner 5K, 10K Pleasant Hill | 10K/5K | Pleasant Hill, CA |
| 530 | 24 Oct 26 | 2026 Night Nation Run - Sacramento, CA | 5K | Sacramento, CA |
| 531 | 24 Oct 26 | Big Sur River Run | 10K/5K | Big Sur, CA |
| 532 | 24 Oct 26 | Trail Run at Sly Park | 5K/10K/8.5M/13.1M/18M/26.2M/50K | Pollock Pines, CA |
| 533 | 24 Oct 26 | SoCal's Sunset Trick or Trot 5K/10K - Halloween Race | 5K/10K | Huntington Beach, CA |
| 534 | 24 Oct 26 | RunThrough USA Long Beach Half Marathon Race | 5K/10K/13.1M | Long Beach, CA |
| 535 | 24 Oct 26 | Napa Wine Country Marathon | 10K/13.1M/26.2M | Calistoga, CA |
| 536 | 24 Oct 26 | Monster Mash Dash Halloween Run | 5K | Fresno, CA |
| 537 | 24 Oct 26 | Monster Dash Half Marathon | 5K/10K/15K/13.1M | Long Beach, CA |
| 538 | 24 Oct 26 | Miles for Migraine - San Francisco | 5K | San Francisco, CA |
| 539 | 24 Oct 26 | Island View Endurance Run | 12K/25K/50K/100K | Goleta, CA |
| 540 | 24 Oct 26 | Dia de los Muertos Half Marathon | 5K/13.1M | Bakersfield, CA |