| 571 | 20 Dec 26 | Dirty December Trail Run | 10K/13.1M/26.2M | San Diego, CA |
| 572 | 20 Dec 26 | Reindeer Run LB Half Marathon | 5K/10K/15K/13.1M | Long Beach, CA |
| 573 | 20 Dec 26 | Rainbow Falls 5K | 5K | San Francisco, CA |
| 574 | 24 Dec 26 | Placerville's Holiday Jingle and Mingle Run | 1M/5K/10K/15K/13.1M | Placerville, CA |
| 575 | 25 Dec 26 | Jingle All the Way - Christmas Day | 5K/10K/13.1M | Long Beach, CA |
| 576 | 26 Dec 26 | Ring Out the Old 5K, 10K, and Half Marathon | 5K/10K/13.1M | Los Angeles, CA |
| 577 | 26 Dec 26 | Happy Holidays Half Marathon | 5K/10K/15K/13.1M | Long Beach, CA |
| 578 | 26 Dec 26 | A Merry Christmas Run 5K/10K/13.1 SAN FRANCISCO | ['5K'/ '10K'/ 'Half Marathon'/ '1M'] | San Mateo, CA |
| 579 | 27 Dec 26 | Stern Grove 4M | 4M | San Francisco, CA |
| 580 | 30 Dec 26 | Havi | Triathlon | Anaheim, CA |
| 581 | 31 Dec 26 | New Year's One Day | 100m/12H/24H/6H relay/6H run | San Jose, CA |
| 582 | 31 Dec 26 | Last Dash Before Midnight 5K, 10K, and Half Marathon | 5K/10K/13.1M | Long Beach, CA |
| 583 | 31 Dec 26 | Brazen New Year's Eve | 5K/10K/13.1M | Castro Valley, CA |
| 584 | 01 Jan 27 | Run in the New Years Half Marathon | 5K/10K/13.1M | Huntington Beach, CA |
| 585 | 01 Jan 27 | Free New Year's Day 5K by Chico Running Club | 5K | Chico, CA |