| 16051 | 16 May 26 | Cartersville Half Marathon | 5K/13.1M | Cartersville, GA |
| 16052 | 26 Nov 26 | Carson Valley Turkey Trot | 5K | Minden, NV |
| 16053 | 26 Sep 26 | Carson Valley Trails Run the Valley 5K/10K | 2K/5K/10K | Carson, NV |
| 16054 | 16 May 26 | Carson to Stevenson Ridge Run 10 Miler | 10M | Stevenson, WA |
| 16055 | 17 May 26 | Carrollton Runners 5K Prediction Run | 5K | Carrollton, TX |
| 16056 | 13 Jun 26 | Carrollton Parks and Rec KIDS TRYathlon | youth triathlon | Carrollton, GA |
| 16057 | 27 Jun 26 | Carrier Mills - Stonefort Cross Country 5K | 5K | Carrier Mills, IL |
| 16058 | 16 May 26 | Carribean Qarnival 5K for Mental Health Awareness | 5K | Huntsville, AL |
| 16059 | 03 Oct 26 | Carrboro 5K/10K | 5K/10K | Carrboro, NC |
| 16060 | 01 Nov 26 | Carpe Diem Epilepsy Run | 3K/5K | Toledo, OH |
| 16061 | 12 Sep 26 | Carpe Diem - Carpe Noctem Half Marathon and 10K | 10K/13.1M | Pleasant Garden, NC |
| 16062 | 18 Jul 26 | Carolina Reaper Challenge | 5M/13.1M/26.2M/50K | Greenville, SC |
| 16063 | 26 Sep 26 | Carolina Childrens Charity Run | 5K | Mount Pleasant, SC |
| 16064 | 13 Dec 26 | Carol of Lights Run | 1M/5K | Lubbock, TX |
| 16065 | 04 Jul 26 | CarmelFest Freedom Run | 1.5M/4.5M | Carmel, IN |