| 226 | | 27 Oct 24 | 2024 Crown Point Marathon/Half-Marathon Relay, SOLO Runs, 8K & 5K | 5K/8K | San Diego, CA |
| 227 | | 28 Jul 24 | 2024 Crystal Lake Aquathon . . | triathlon | Crystal Lake, IL |
| 228 | | 17 Aug 24 | 2024 Crystal Lake Triathlon | triathlon | Averill Park, NY |
| 229 | | 25 May 24 | 2024 Crystal River Triathlon Series - Sprint #1 | triathlon | Crystal River, FL |
| 230 | | 20 Jul 24 | 2024 CTP 100th Anniversary Kids Triathlon | triathlon | Canonsburg, PA |
| 231 | | 27 Jul 24 | 2024 Culpeper Triathlon | triathlon | Culpeper, VA |
| 232 | | 31 Aug 24 | 2024 Cultivation Nation Triathlon | triathlon | Wiggins, MS |
| 233 | | 22 Jun 24 | 2024 Cure Coats' 5K | 5K | Brisbane, CA |
| 234 | | 18 Aug 24 | 2024 CVC San Diego Triathlon . . | triathlon | Chula Vista, CA |
| 235 | | 09 Jun 24 | 2024 Cycling Camp . . | triathlon | Beech Mountain, NC |
| 236 | | 26 Jul 24 | 2024 Cypress Sprint and Youth Triathlon | triathlon | Cypress, TX |
| 237 | | 13 Oct 24 | 2024 Daingerfield 5k & 10k | 10K/5K | Arlington, VA |
| 238 | | 17 Aug 24 | 2024 Dam 09 Triathlon ?? . . | triathlon | San Antonio, TX |
| 239 | | 14 Jul 24 | 2024 DAM Sprint Tri & Duathlon . . | triathlon | Amesbury, MA |
| 240 | | 25 May 24 | 2024 Dark Island Trail Half Marathon and Relay | Half Marathon | Central, NE |
