| 12661 | 11 Apr 26 | 2026 Cedar Creek SPRING Duathlon | triathlon | Seaford, NY |
| 12662 | 12 Apr 26 | 2026 CaveMan Triathlon | triathlon | Flower Mound, TX |
| 12663 | 14 Mar 26 | 2026 Catalina Island 10K, 5K | 10K/5K | Avalon, CA |
| 12664 | 14 Mar 26 | 2026 Catalina Island 10K, 5K | 10K | Avalon, CA |
| 12665 | 03 Oct 26 | 2026 Castle Creek Triathlon | triathlon | Morristown, AZ |
| 12666 | 25 Apr 26 | 2026 CASA Superhero's 5k Run & Walk | 5K | Laredo, TX |
| 12667 | 12 Apr 26 | 2026 Care Packages at Carderock 5k/10k/Half | 10K/13.1/5K | Potomac, MD |
| 12668 | 06 Sep 26 | 2026 Carderock Charge 5k/10k/Half | 10K/13.1/5K | Potomac, MD |
| 12669 | 02 May 26 | 2026 Carderock 5k/10k/Half | 10K/13.1/5K | Potomac, MD |
| 12670 | 29 Mar 26 | 2026 Capy "Happy" Birthday To Me 2026- Benefitting Make a Wish Foundation | Virtual | Mobile, AL |
| 12671 | 16 May 26 | 2026 Capt. Sisson Memorial 5K Run to Extinguish Firefighter Cancer | 5K | Fairfax Station, VA |
| 12672 | 31 May 26 | 2026 Capitol City Chase 5k/10k/Half | 10K/13.1/5K | Washington, DC |
| 12673 | 08 Mar 26 | 2026 Cape Cod Indoor Triathlon | triathlon | Barnstable, MA |
| 12674 | 17 May 26 | 2026 Caledon 5k/10k | 10K/5K | King George, VA |
| 12675 | 19 Jul 26 | 2026 Cal Tri Williamsburg | triathlon | Williamsburg, VA |