| 16261 | 08 Aug 26 | Circle the Bay 30K | 30K | North Bend, OR |
| 16262 | 27 Jun 26 | Circle of Life Half Marathon | 5K/10K/13.1M | Lake, MN |
| 16263 | 21 Nov 26 | Circle Endurance Event 3, 6, 12, 24 Hour | 12H/24H/3H run/6H | Ringgold, GA |
| 16264 | 20 Mar 27 | Circle City Donut Dash | 5K | Indianapolis, IN |
| 16265 | 05 Jun 26 | Cipriano Classic 5K | 5K | Farmington Hills, MI |
| 16266 | 26 Nov 26 | Cinnamon Roll 5K | 5K | Plant, FL |
| 16267 | 02 Jan 27 | Cinnamon Bun Run | 5K/10K | Plano, TX |
| 16268 | 04 Oct 26 | Cindy's Race 10K/6K | 1K/6K/10K | Santa Rosa, CA |
| 16269 | 30 May 26 | Cinderella Trail Run | 8K/13.1M/30K/26.2M/50K | Oakland, CA |
| 16270 | 09 May 26 | Cinco de Miler - Chicago | 5M | Chicago, IL |
| 16271 | 08 Aug 26 | Cincinnatus Track Fest | track meet | Cincinnati, OH |
| 16272 | 16 Aug 26 | Cincinnati Triathlon & Multisport Festival | Olympic/Other/Sprint/Sprint Aquathon/supersprint duathlon/supersprint triathlon | Waynesville, OH |
| 16273 | 06 Jun 26 | Cincinnati Spartan Trifecta | 5K/21K/50K | Lawrenceburg, IN |
| 16274 | 28 Nov 26 | Cincinnati Hungry Turkey Half Marathon & 5K | 5K/13.1M | Cincinnati, OH |
| 16275 | 29 Aug 26 | Cincinnati Dragons 5K | 5K | Hamilton, OH |