| 15751 | 26 Sep 26 | Dick Collins Firetrails | 26.2M/100K | Castro Valley, CA |
| 15752 | 15 Aug 26 | Ken Morgan Memorial Clove Run | 1M/5K | Castleton-on-Hudson, NY |
| 15753 | 13 Sep 26 | 2026 Tri the Rock Youth Triathlon | triathlon | Castle Rock, CO |
| 15754 | 18 Jul 26 | Summer Splash Prairie Dog Half Marathon, 10k & 5k | 10K/13.1/5K | Castle Rock, CO |
| 15755 | 18 Jul 26 | Prairie Dog Half and 10K - Castle Rock | 5K/10K/13.1M | Castle Rock, CO |
| 15756 | 29 Aug 26 | Rock Hawk Trail Races | 5K/10K/25K/50K | Castle Rock, CO |
| 15757 | 04 Jul 26 | July 4th ROCK-IT Run | 5K/13.1M | Castle Rock, CO |
| 15758 | 03 Oct 26 | Castle Rock Trail Festival | 5K/10K/13.1M/50K | Castle Rock, CO |
| 15759 | 13 Sep 26 | Glen Iris 5K and 10K Trail Run | 5K/10K | Castile, NY |
| 15760 | 18 Jul 26 | Castalia Cold Creek 5K | 5K | Castalia, OH |
| 15761 | 09 Oct 26 | Heartland | 125M | Cassoday, KS |
| 15762 | 26 Sep 26 | Battle of the Bands 5K | 5K | Casselberry, FL |
| 15763 | 05 Sep 26 | CassadagaMan | Olympic Triathlon/Olympic Triathlon Relay/halfiron | Cassadaga, NY |
| 15764 | 08 Jul 26 | Southern Tier Triathlon Club Summer Tri Series | supersprint triathlon | Cassadaga, NY |
| 15765 | 15 Aug 26 | Cassadaga Kids Triathlon | youth triathlon | Cassadaga, NY |