| 15841 | 27 Nov 25 | 2025 CRC Thanksgiving Day 13.1, 6.2, 3.1 & Fun Run/Walk | 5K/10K | Fort Worth, TX |
| 15842 | 30 Nov 25 | 2025 Cranberry Crawl Turkey Trot 5k/5-Miler/10M | 10K/13.1/5K | Washington, DC |
| 15843 | 14 Sep 25 | 2025 Craig Ranch McKinney Triathlon | triathlon | McKinney, TX |
| 15844 | 18 Oct 25 | 2025 Coronado Heights Run | 5K/15K | Lindsborg, KS |
| 15845 | 14 Sep 25 | 2025 Cool Sommer Mornings Sprint Triathlon, Duathlon & 5K #4 | triathlon | Clermont, FL |
| 15846 | 05 Oct 25 | 2025 Cohutta Triathlon | triathlon | Crandall, GA |
| 15847 | 28 Sep 25 | 2025 Classic City Sprint, Duathlon & Aquabike | triathlon | Athens, GA |
| 15848 | 06 Dec 25 | 2025 Clash Daytona - Saturday Events | triathlon | Daytona Beach, FL |
| 15849 | 06 Sep 25 | 2025 CiderMan Sprint Triathlon | triathlon | Millstadt, IL |
| 15850 | 06 Sep 25 | 2025 Chroma Team Racing Championship . . | triathlon | Nashville, TN |
| 15851 | 24 Dec 25 | 2025 Christmas Eve 5k/10k | 10K/5K | Washington, DC |
| 15852 | 25 Oct 25 | 2025 Chessie Trail Marathon, Half Marathon, 10K, 5K, & 26.2 Relay | 10K/13.1/26.2/5K | Lexington, VA |
| 15853 | 13 Sep 25 | 2025 Chesaning Chamber of Commerce Dry-Tri - SEPTEMBER 13 | triathlon | Chesaning, MI |
| 15854 | 05 Oct 25 | 2025 CFH Affordable Housing 5k | 5K | Lorton, VA |
| 15855 | 04 Oct 25 | 2025 Center of the Nation Series - Day 6 (MT) | 5K/10K | Baker, MT |