| 11491 | 12 Apr 26 | 2026 Columbia Gateway Duathlon | triathlon | Columbia, MD |
| 11492 | 06 Jun 26 | 2026 Colorado Triathlon | triathlon | Boulder, CO |
| 11493 | 20 Jun 26 | 2026 Clemson Triathlon | triathlon | Seneca, SC |
| 11494 | 27 Mar 26 | 2026 CLASH Miami Triathlon - Sunday Events | triathlon | Homestead, FL |
| 11495 | 29 Mar 26 | 2026 CLASH Endurance Coastal Mississippi | triathlon | Gulfport, MS |
| 11496 | 02 May 26 | 2026 Citrus Kids Triathlon - Bicentennial Park | triathlon | Crystal River, FL |
| 11497 | 09 May 26 | 2026 Cinco de Miler | 1M | Chicago, IL |
| 11498 | 26 Jul 26 | 2026 Chisago Lakes Triathlon - Sunday | triathlon | Chisago, MN |
| 11499 | 15 Feb 26 | 2026 Chilly Willy Duathlon | triathlon | St Petersburg, FL |
| 11500 | 21 Feb 26 | 2026 Chilly Cheeks Winter Duathlon & 4 Mile Run | triathlon | Englewood, CO |
| 11501 | 10 Jan 26 | 2026 Chill Chase 5k/10k | 10K/5K | College Park, MD |
| 11502 | 21 Mar 26 | 2026 Chickahominy Chase 5k/10k | 10K/5K | Williamsburg, VA |
| 11503 | 31 Jan 26 | 2026 Cherrylake Farm Races | triathlon | Groveland, FL |
| 11504 | 19 Sep 26 | 2026 Chelanathon | triathlon | Manson, WA |
| 11505 | 07 May 26 | 2026 Cerberus 3-Day Expedition Stage Race | triathlon | New Castle, VA |