| 586 | 02 May 26 | Wicked Wine Run Napa Valley | 1K/5K | Saint Helena, CA |
| 587 | 02 May 26 | California Brewery Running Series | 5K | Ontario, CA |
| 588 | 03 May 26 | 2026 Spring Sprint Triathlon and SD Tri Series 5K | 5K | San Diego, CA |
| 589 | 03 May 26 | 2026 Cal Tri Ventura ~ Results | triathlon | Ventura, CA |
| 590 | 03 May 26 | 2026 Spring Sprint Triathlon | triathlon | San Diego, CA |
| 591 | 03 May 26 | Avenue of the Giants Marathon | 10K/13.1M/26.2M | Arcata, CA |
| 592 | 03 May 26 | Aztec Run for Education | 5K | Oakland, CA |
| 593 | 03 May 26 | Bay Bridge Half Marathon | 13.1M | Oakland, CA |
| 594 | 03 May 26 | Beer City Half Sacramento | 1M/5K/10K/13.1M | Sacramento, CA |
| 595 | 03 May 26 | Cal Tri Ventura | 5K/10K | Ventura, CA |
| 596 | 03 May 26 | Cinco de Mile Half Marathon and Ole 5 Que | 5K/13.1M | Bakersfield, CA |
| 597 | 03 May 26 | Devil Mountain Run | 1M/5K/10K | Danville, CA |
| 598 | 03 May 26 | Empire Strides Back - May the 4th be with You | 5K/10K/13.1M | Long Beach, CA |
| 599 | 03 May 26 | Sombrero Marathon | 5K/10K/13.1M/26.2M | Santa Clarita, CA |
| 600 | 03 May 26 | Spring Sprint Triathlon Festival | Olympic/Sprint Aquathon/Sprint Duathlon/Sprint Triathlon | San Diego, CA |